Both eukaryotic and prokaryotic cells may share the same chloroplast structures. Plant cells that are prokaryotic and eukaryotic both have a cell wall.
A component known as the cell wall is found outside of the cell membrane in many varieties of prokaryotes and eukaryotes. Prokaryotes everyone has thick, rigid cell walls which give them their shape, with only a few exceptions. All fungi & plants, as well as some protists, have cell walls. A rigid cell wall encompasses the plasma membrane in the majority of prokaryotic cells, giving the organism its shape. Vertebrates lack a cell wall in eukaryotes, whereas plants do. Prokaryotic cell walls are chemically distinct from eukaryotic plant cell walls, which are primarily composed of cellulose.
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the covering that encloses the heart is called the
A fibrous sac that surrounds the heart and major arteries is called the pericardium.
It facilitates the heart's movements, keeps it from colliding with the lungs or other mediastinal structures, and maintains the heart's position in the mediastinum. There are two layers in the pericardium: the fibrous layer and the serous layer. The fibrous pericardium is a sac with a conical shape. The roots of the great vessels at the base of the heart are fused with its apex. Its broad base rests on top of the diaphragm's central fibrous region, which it is fused to. The sternum and the anterior portion of the fibrous pericardium are joined by weak sterno-pericardial ligaments. The fibrous pericardium (parietal layer) is lined by the serous pericardium, a layer of serosa that wraps around the roots of the great vessels to cover the entire surface of the heart (visceral layer).
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term associated with farsightedness that occurs with aging
The term associated with farsightedness that occurs with aging is Presbyopia. As a consequence of this, things appear out of focus.
In contrast to the cornea, the lens has some flexibility and the ability to change shape with the assistance of a circular muscle that surrounds it. The circular muscle relaxes when you look at something from a distance. The muscle contracts when you look at something nearby, allowing the relatively flexible lens to curve and alter its focusing power.
The lens of your eye becomes harder as you get older, which is what causes presbyopia. Your lens can no longer bend to focus on close-up images as it gets stiffer.
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What body system controls the body by means of chemical molecules called hormones?
Hormones are molecules that are created and released by specific glands to regulate and govern the functioning of particular cells and organs.
What are the functions of hormones?
As we know that hormones are molecules that effectively serve as the body's messengers. The endocrine glands are specialized glands that release these substances(hormones). The body contains many of these endocrine glands. These messengers regulate both psychological well-being and a variety of physiological processes. They play a significant role in preserving the body's homeostasis as well.
Why do hormones have the name "chemical messengers"?
Hormones play the important duty of a messenger. The forebrain region of the hypothalamus contains a large number of neurosecretory cells. These neurosecretory cells are trained to secrete neurohormones, a type of hormone. They cause the anterior lobe of the pituitary to secrete a number of additional hormones.
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one possible effector response to a hormone is contraction of smooth muscle. this can be exemplified by contractions of the uterus under the influence of
Smooth muscle contraction is one potential effector reaction to a hormone. The uterus contracting when oxytocin is present is one example of this.
The uterine muscles are stimulated to contract by oxytocin, and prostaglandin production rises as a result, intensifying the contractions even further. If labor has not begun naturally, artificial oxytocin may be administered. It may also be used to intensify contractions to speed up deliveries.
Circulating oxytocin induces uterine contractions, and oxytocin released in the brain affects the physiology and behavior of the mother during labor. During childbirth, oxytocin induces the smooth muscle cells in the uterus to contract and causes the mammary glands to secrete milk.
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If a pollen spore is unable to carry s proteins in its pollen coat, can plants still prevent the germination of this pollen if it is too genetically similar?
Plants can still prevent the germination of pollen that is unable to carry S proteins in its pollen coat, even if it is not too genetically similar.
This is because there are other mechanisms that plants use to prevent self-fertilization and promote outcrossing, such as self-incompatibility systems.
Self-incompatibility is a mechanism that prevents self-fertilization in plants by recognizing and rejecting pollen that is genetically similar to the pistil of the flower.
This mechanism is controlled by a set of genes known as the S-locus genes, which encode for S-RNase enzymes that cleave the RNA of the pollen grain and prevent its germination. However, not all plants use this self-incompatibility system, and some plants have alternative mechanisms to prevent self-fertilization.
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True or False:
The hypothalamus secretes eight hormones, six to regulate the anterior pituitary and two that are stored in the posterior pituitary.
The given statement " that the hypothalamus secretes eight hormones, six to regulate the anterior pituitary and two that are stored in the posterior pituitary" is false because hypothalamus is secrets important hormones.
The hypothalamus is responsible for the secretion of nine hormones. Two hormones are secreted and stored in the posterior pituitary, including oxytocin and vasopressin. Six hormones are secreted from the hypothalamus and regulate the anterior pituitary, which are growth hormone releasing hormone.
Thyroid stimulating hormone releasing hormone, corticotropin releasing hormone, gonadotropin releasing hormone, prolactin releasing hormone, and somatostatin. The ninth hormone, called neuropeptide Y, is secreted and acts on both the anterior and posterior pituitary. Neuropeptide Y is a peptide hormone that affects appetite and stress responses in the body.
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Which of these muscles is particularly associated with anchoring the right and left atrioventricular valves?pectinate musclestrabeculae carneaepapillary musclesmyocardium
Right before ventricular systole, papillary muscles shorten to tighten the left and right atrioventricular valves via the chordae tendineae.
Which muscles help to anchor the left and right atrioventricular valves?The papillary muscles are heart ventricle-based muscle cells. They attach via the chordae tendineae to the cusps of the atrioventricular valves, commonly known as the mitral and tricuspid valves, and contract to stop these valves from prolapsing or inverting during systole (or ventricular contraction).
What muscles regulate the AV valves?pectoral muscles). The papillary muscles and chordae tindineae attach the AV valves to the ventricular walls. As a result, the valves can seal properly and won't prolapse into the atria.
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simple diffusion of a molecule down its concentration gradient requires an input of energy to the system.True or False
simple diffusion of a molecule down its concentration gradient requires an input of energy to the system is false.
A chemical can simply diffuse down its concentration gradient without adding energy to the system. Simple diffusion is an unforced, passive process that moves molecules from one region of higher concentration to another region of lower concentration. The random thermal motion of the particles causes the movement of molecules, and as a result, there is a net shift in the concentration of the particles from high to low. This eliminates the need for energy input from an external source and resulting in an equalization of molecule concentration throughout an area.
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tattooing can be permanent if the ink particles get trapped in which layer?\
The layer of the epidermis that is responsible for tattooing is the dermis, which lies directly beneath it.
The dermis consists of collagen fibers that form a structural support for the skin and it is also where sweat glands, hair follicles, and blood vessels are found.
Tattoos become permanent when ink particles are inserted into the dermis, and as the epidermis continues to regenerate, the ink particles remain and the tattoo does not fade away. The dermis is more resilient to damage than the epidermis and, thus, is able to maintain the tattoo.
Tattoos are made permanent by using a tattoo machine, which punctures the skin with tiny needles and inserts the ink into the dermis. The ink is then held in the dermis, making the tattoo a lasting addition.
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what is unusual about endocannabinoids or endogenous cannabinoids? what is unusual about endocannabinoids or endogenous cannabinoids? they are retrograde messengers by which postsynaptic neurons act on presynaptic terminals. they contain a chemical structure called catechol. they float in the membrane like adenylyl cyclase. they play an important role in the brain systems that regulate mood.
The unusual about endocannabinoids or endogenous cannabinoid is they are retrograde messengers by which postsynaptic neurons act on presynaptic terminals.
Thus, the correct answer is A.
Endocаnnаbinoids аre produced from postsynаptic terminаls upon neuronаl аctivаtion. The two mаjor endocаnnаbinoids: 2-аrаchidonolglycerol (2-АG) is biosynthesized from diаcylglycerol (DАG) by diаcylglycerol lipаse-α (DАGLα), аnd аnаndаmide (АEА) is synthesized from N-аcyl-phosphаtidylethаnolаmine (NАPE) by NАPE-specific phospholipаse D (NАPE-PLD). Аs lipids, endocаnnаbinoids, mаinly 2-АG, reаdily cross the membrаne аnd trаvel in а retrogrаde fаshion to аctivаte CB1Rs locаted in the presynаptic terminаls.
Your options aren't well arranged, but most probably your options were
A. they are retrograde messengers by which postsynaptic neurons act on presynaptic terminals.
B. they contain a chemical structure called catechol.
C. they float in the membrane like adenylyl cyclase.
D. they play an important role in the brain systems that regulate mood.
Thus, A is the correct option.
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What is the genetic foundation of a particular phenotype that includes contributions of dna from both parents.
The genetic foundation of a particular phenotype characteristics, is basically determined by the interaction of its genetic information or the DNA contributions which it has gained from both the parents.
Phenotype is basically defined as all the observable characteristics of an organism. The phenotype is determined the genetic makeup or the genotype of a particular organism. Every organism receives DNA from both its parents.
The phenotype of the organism depends on how the genes interact. If both the parents of the organism contribute to the same allele, a homozygous genotype is obtained and the phenotype which the individual will show the characteristics whereas if the parents contribute to different alleles, the individual will be heterozygous and will show different phenotype.
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describe the role of internal feedback mechanisms in maintaining homeostasis
Internal feedback mechanisms are essential for sustaining homeostasis, which is the act of regulating and stabilizing the body's internal environment. These systems monitor internal environment.
changes and respond to departures from a predetermined point or goal range by activating appropriate physiological responses to restore balance. When body temperature goes above normal, a feedback process in the brain stimulates the hypothalamus, causing perspiration, which cools the skin and reduces body temperature. When blood glucose levels rise, the pancreas releases insulin to accelerate cell absorption and reduce blood glucose levels. When blood glucose levels drop, glucagon is produced to encourage the liver to release stored glucose into the bloodstream and boost blood glucose levels.
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in a cytosolic folded protein, what orientation and/or interaction do the hydrophobic amino acids tend to have?
In a cytosolic folded protein the hydrophobic amino acids are tucked away inside the protein.
Hydrophobic amino acids are non polar in nature and tend to cluster along the interior side of the cluster protein in order to avoid any contact with the aqueous cytosolic environment. For e.g Tryptophan. In this manner they remain secure from water and thus make protein fold stable.
Phenylalanine is displayed as the most hydrophobic amino acids in light of this methodology (Dark and Form 1991 ). Notwithstanding strategies contrasts, there is a decent understanding that the accompanying amino acids: phenylalanine, leucine, isoleucine, tyrosine, tryptophan, valine, methionine, and proline can be gathered as hydrophobic.
In this interaction non-polar amino acids only interact with the similar kind of molecules and get folded within to form a cluster around the center protein species as this interaction is more energetically favorable than another one.
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what are the advantages of using a chemostat to keep microbial cells in a state of continuous growth?
The advantages of using a chemostat to keep microbial cells in a state of continuous growth are
a uniform population of cells is maintaineda constant growth rate and cell density can be maintainedThe chemostаt is а biologicаl heterogeneous CSTR. The microbes аre considered а solid phаse, аnd for аerobic fermentаtions, oxygen or аir is bubbled through the tаnk to аllow oxygen mаss trаnsfer into the mediа, resulting in а three-phаse reаctor. In а chemostаt, one cаn control the flow rаte аnd mаintаin а constаnt substrаte concentrаtion, аs well аs provide continuous control of pH, temperаture аnd oxygen levels. This аllows control of the rаte of growth, which cаn be used to optimize the production of specific microbiаl products.
Your question is incomplete, but most probably your full options were
A. all five phases of growth are represented
B. the chemostat is a good way to maintain sterility
C. a uniform population of cells is maintained
D. a constant growth rate and cell density can be maintained
Thus, the correct answers are C and D.
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Select all of the following that are present in both prokaryotic cells and eukaryotic cells.
A. Pigments
B. RNA
C. Nucleus
D. Cytoplasm
E. Ribosomes
F. DNA
In eukaryotic cells, membrane-bound organelles such as the endoplasmic reticulum (ER), a golgi complex, endosomal, mitochondria, microbodies, and vacuoles are present.
In layman's terms, what's really rough endoplasmic reticulum?Proteins and other chemicals flow through a network interconnected membranes called the endoplasmic reticulum, which is located inside a cell.Ribosomes are the organelles where proteins are put together.
What are rough ER and smooth ER?The existence of ribosomes distinguishes RER and SER in the most fundamental way.An ER is known as Rough ER because of the distinctively rough appearance it takes on when ribosomes connect to its surface.A smooth ER, on the other hand, doesn't have ribosomes on it's own surface.
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What controls the amount of light reaching the ocular lens in a microscope?
The amount of light reaching the ocular lens in a microscope is controlled by an adjustable diaphragm or iris diaphragm.
What is an adjustable diaphragm or iris diaphragm?
The diaphragm may be adjusted to control the quantity of light that reaches the specimen and is situated in the path of light between the light source and the specimen. The amount of light that reaches the specimen can be altered by expanding or contracting the opening in the diaphragm, respectively. By doing so, the user can modify the brightness of the image and account for changes in the light source's intensity. The diaphragm aids in preventing over-illumination of the specimen, which can harm the cells or tissues being studied, by regulating the quantity of light that reaches the specimen.
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herniation of disc material into the vertebral body resulting in a short based endplate depression surrounded by a thin sclerotic rim is known as what?
When the intervertebral herniation-disc's outer fibers (the annulus) are compromised, the nucleus pulposus's soft inner substance ruptures outside of its usual region.
The material from the nucleus pulposus may push into the spinal canal if the annulus tears close to the spinal canal. A Schmorl's node (SN) is the herniation of the nucleus pulposus (NP) through the cartilaginous and bony end plate into the body of the neighboring vertebra, as first described in 1927.
Schmorl's nodes are a typical kind of spinal disc herniation in which the soft tissue of the intervertebral disc protrudes into the neighboring vertebrae via an endplate defect. Schmorl's nodes are frequently detected in the upper lumbar spine and are frequently found by chance during imaging tests.
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the superior portion of the nasal septum is formed by the___
The vomer bone makes up the lower section of the nasal septum, and the perpendicular plate of the ethmoid bone forms the upper portion.
What shapes the nasal septum's upper half?Lateral upper cartilages: Two triangular-to-trapezoidal cartilages, referred to as the upper lateral cartilages, flank its top half. They are united to the dorsal septum in the midline and laterally connected to the bony boundary of the pyriform aperture by loose ligaments. The upper lateral cartilages' inferior ends are free.
Which bone makes up the nasal septum's inferior portion?In humans, the vomer forms the inferior portion of the nasal septum, and the perpendicular plate of the ethmoid bone creates the superior portion.
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of the following terms, which are associated with cnidarians: a: nematocysts b: choanocytes c: gastrovascular cavity d: cubozoa e: cnidocyte f: polyp g: coral h: triploblastic
nematocysts , gastrovascular cavity , cnidocyte , polyp , and coral are body associated with cnidarians.
Cnidarians are a group of invertebrates body that include jellyfish, sea anemones, and corals. They are characterized by the presence of specialized cells called cnidocytes, which contain stinging organelles called nematocysts. Cnidarians have a simple digestive system with a single opening, known as the gastrovascular cavity, which functions both as a mouth and an anus. The body form of cnidarians is divided into two basic types: the polyp, which is sessile, and the medusa, which is free-swimming. Cnidarians have a simple body organization and are considered diploblastic, lacking a third germ layer in their embryonic development.
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The scientist who connected sickle-cell anemia with an increased survival rate from malaria was-Sean Carroll-Tony Allison-David Attenborough-Tony Romo-Charles Darwin
He was Tony Allison, the scientist who connected sickle-cell anemia with an increased survival rate from malaria. Sickle cell disease (SCD) is a group of blood disorders that is typically inherited.
"Sickle cell anemia" is the term used to describe the most common type. As a result, the normal haemoglobin, which carries oxygen in red blood cells, starts to exhibit anomalies. This can occasionally take the shape of a rigid sickle. Infants with sickle cell disease frequently experience problems as young as 5 to 6 months old. A few potential health problems include anemia, swelling hands and feet, bacterial infections, stroke, and pain episodes (also known as sickle cell crises). Those who are older may have ongoing pain. People typically live between 40 and 60 years in wealthy countries.
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how does a topographic map serve as a good model of a mountain?
Answer:
Since Topographic maps show the elevation, slope, and relief of a land surface by using contour lines, it gives a good contour of the mountain
I hope this helped :)
Answer: cmd c + cmd v
topographic maps show the elevation, slope, and relief of a land surface by using contour lines. Reading the contour lines allows us to visualize how a particular surface feature would look like, whether it has gentle or steep slopes. cmd c + cmd c
Explanation: When looking at a topographic map of a hill or mountain you will see a series of concentric circles or shapes following the contours of the mountain. These circles will gradually get smaller and smaller toward the peak of the mountain.
evidence is mounting that covid is bad for the brain
It's horrifying to think that a Covid infection might harm your brain. Scientists have determined that neurological alterations, including weariness, brain fog, and memory issues,
Covid. Additionally, even for minor episodes of the virus, some researchers have discovered alterations in the brain. It is true that there is accumulating evidence that Covid-19 can harm the brain. Some patients have reported memory loss, anxiety, and confusion after getting over the infection. Additionally, there have been cases of strokes and other neurological issues in people who have Covid-19. According to studies, the virus can inflame the brain, which can result in long-term neurological damage. It is becoming more and more obvious that Covid-19 can have an adverse and long-lasting effect on the brain as more research is done.
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Choose the correct statement regarding the function of platelets.- They secrete chemicals that repel neutrophils and monocytes.- They secrete factors that inhibit mitosis in fibroblasts and smooth muscle.- They secrete procoagulants, or clotting factors, which promote blood clotting.- They secrete vasodilators.- They prevent the formation of a clot-dissolving enzyme that dissolves blood clots which have outlasted their usefulness.
Platelets secrete procoagulants, or clotting factors, which promote blood clotting. They also alter their appearance, activate receptors, and discharge chemical signals.
Platelets play a significant role in hemostasis, the process of halting bleeding at the site of torn endothelium. Except in cases where the obstruction is physically too large, they congregate there and close the opening. To begin with, adhesion occurs when platelets cling to objects outside of the damaged endothelium. Thirdly, they assemble to connect with one another via receptor bridges. When the coagulation cascade is started by this primary hemostasis (platelet clog), fibrin is deposited and linked (secondary hemostasis).
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if a pollen spore is unable to carry s proteins in its pollen coat, can plants still prevent the germination of this pollen if it is too genetically similar? A. Yes in all cases B. No C. Yes but only through sporophytic SI D. Yes but only by gametophytic SI
If a pollen spore is not able to carry S protein in its pollen coat, then the plants can still prevent the germination of this pollen even if it is too genetically similar but only through the sporophytic SI.
Hence, option C is the correct option.
Self-incompatibility or SI is one of the most crucial mechanisms which are used by plants in order to be able to prevent self-pollination and then consequently inbreeding. It is controlled genetically by the S-locus, which is able to allow the recognition as well as the rejection of self, or the S-phenotypically identical, pollen.
If a particular pollen spore is not carrying this S protein in its pollen coat, then the plants will still be able to prevent the germination of this pollen even though too genetically similar but only through the sporophytic SI.
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which of the following is a characteristic of gymnosperm reproduction? production of microspores on leaves protection of megasporangia in an integument production of bisexual cones fertilization in strobili or related structures requirement of water for transfer of sperm from pollen to egg
Protection of megasporangia in an integument is a characteristic of gymnosperm reproduction.
Conifers, cycads, Ginkgo, and gnetophytes are among the seed-producing plants of the clade Gymnospermae that make up the gymnosperms. The term refers to the fact that their seeds are not contained. In contrast to the seeds and ovules of flowering plants, which are enclosed within an ovary, their seeds are not enclosed. Gymnosperm seeds can grow alone, as in the case of yew, Torreya, and ginkgo, or on the surface of scales or leaves, which are frequently modified to create cones. In the lifecycles of gymnosperms, generations alternate. They have a decreased haploid gametophyte phase that depends on the sporophytic phase and a dominating diploid sporophyte phase. In paleobotany, all non-angiosperm seed plants are referred to as "gymnosperms."
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complete question:Which of the following is a characteristic of gymnosperm reproduction?
A. Requirement of water for transfer of sperm from pollen to egg
B. Protection of megasporangia in an integument
C. Production of bisexual cones
D. Production of microspores on leaves
E. Fertilization in strobili or related structures
transport protein that changes shape when a particle binds with it
A transport protein that is particular to an ion, molecule, or collection of substances is known as a carrier protein.
Which passive transport method makes use of transport proteins?A form of passive transport is facilitated transport. In contrast to simple diffusion, where substances flow across a membrane without the aid of membrane proteins, substances diffuse across the plasma membrane with the aid of membrane proteins in assisted transport, also known as facilitated diffusion.
What causes the shape shift in transport proteins?Carrier proteins are the other class of transport protein. In order to transport the molecule across the plasma membrane, carrier proteins must adapt their structure. After the ion or molecule has been bound, carrier proteins alter their form to "transport" the ion or molecule across the membrane.
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Complete question:
A transport protein that is particular to an ion, molecule, or collection of substances is known as a .
What is the expected ratio of the offspring of a BbTt x BbTt cross of these alleles assort independently?
The expected ratio of offspring from a BbTt x BbTt cross of these alleles assorting independently is 9 B_T_, 3 B_tt, 3 bbT_, and 1 bbtt, with 9 offspring containing both dominant alleles and 1 bbtt containing both recessive alleles.
What is the significance of Mendel's trait?Mendel explains different laws and rules to better understand the genetics because, as per the independent assortment rules, the gametes are independently assorted and expressed in the offspring. Here 9 B_T_ will produce where these offsprings will express both alleles (either BBTT/BbTt/BbTT/BBTt etc)
As a result, the expected ratio of offspring from a BbTt x BbTt cross of these alleles assorting independently is 9 B_T_, 3 B_tt, 3 bbT_, and 1 bbtt, with 9 offspring containing both dominant alleles and 1 bbtt containing both recessive alleles.
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what is located on the posterior side of the distal end of the humerus superior to the trochlea and articulates with the olecranon process of the ulna?
The olecranon fossa connects to the olecranon process of the ulna and is situated on the back of the distal end of the humerus, superior to the trochlea.
The olecranon process of the ulna, which crosses the backside of the elbow joint, is where the triceps brachii muscle connects. that will enable the triceps to function as an elbow joint extensor.
The common extensor tendon, which emerges from the lateral epicondyle of the elbow, is directly impacted. The extensor carpi radialis brevis (ECRB) and longus, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris make comprise the common extensor tendon.
The biceps brachii, brachialis, and brachioradialis are the primary elbow flexors. The triceps brachii is the primary elbow flexor. The anconeus, however, may possibly be involved in elbow extension.
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Which three structures are possessed by all bacteria?a. chromosomes b. cell membranec. ribosomes
Cell membrane, Chromosome(s), Ribosomes are possessed by all bacteria cells
The most of the time, bacteria live in freedom and only have one biological cell. They account for a large chunk of the prokaryotic microbial kingdom. The bulk of the environments on Earth are home to bacteria, which are generally a few micrometres long and were among the earliest living things to emerge. Bacteria may be found in soil, water, acidic hot springs, radioactive waste, and the deep biosphere of the Earth's crust. Bacteria play a crucial role in several stages of the nutrition cycle by recycling nutrients like nitrogen from the atmosphere. The nutrient cycle includes the breakdown of dead bodies; microorganisms are in charge of the putrefaction stage of this process.
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complete question:Select all that apply
Which of the following structures are possessed by all bacteria cells?
A.) Cell wall
B.) Glycocalyx
C.) Cell membrane
D.) Chromosome(s)
E.) Ribosomes
the vasopressor(s) used to increase blood pressure during an emergency is/are group of answer choices wyamine sulfate. epinephrine. valium. wyamine sulfate and epinephrine.
The vasopressor(s) used to increase blood pressure during an emergency is wyamine sulfate. The pressure in the major arteries is meant when the word "blood pressure" is used without qualifier.
Blood pressure is the force that flowing blood exerts against the walls of blood vessels (BP). The heart's work of pumping blood through the circulatory system is primarily responsible for this pressure. The ratio of diastolic pressure, or the lowest pressure experienced between two heartbeats, to systolic pressure, or the highest pressure experienced during one heartbeat, is frequently used to calculate blood pressure. Millimeters of mercury (mmHg) are used to measure the elevation above the adjacent atmospheric pressure.
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