PositivePositive emission tomography (PET) scan technique of studying the brain involves injecting the patient with radioactive glucose.
What is a PET technique?Positron emission tomography (PET) is a type of nuclear medicine procedure that measures metabolic activity of the cells of body tissues. PET is actually a combination of nuclear medicine and biochemical analysis.
A PET technique can be used to find the malignant tumor cells or diagnose condition like epilepsy.
A small amount of radioactive glucose is injected into the veins.
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The enzyme located in the inner mitochondrial membrane that synthesizes atp is known as ________.
Answer:
ATP Synthase
Explanation:
Wgat structures composed of specialized tissues designed to perform specific fuctions in plans and animals called:_________
Organs are the structures composed of specialized tissues designed to perform specific functions in plants and animals.
Organs are the structures made up of similar types of tissues, These work in coordination to perform a similar type of function. The heart, kidney, lungs, stomach are all examples of organs. These are differentiated structures that perform a specific task.
Tissues are the mass of cells that are of similar type. The differentiated cells combine together to form a tissue. These cells also work in coordination so that the tissue can perform a certain type of function. Tissues can be plant tissue or animal tissue depending upon whether they have plant cell or animal cell.
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The muscular tube between the stomach and the large intestine, divided into the duodenum, the jejunum, and the ileum, is the:_____.
The muscular tube between the stomach and the large intestine, divided into the duodenum, the jejunum, and the ileum, is referred to as the small intestine.
What is Small intestine?
This refers to a part of the gastrointestinal tract which is the longest and is also involved in the digestion of food substances into other absorbable forms in the body.
It is divided into three segments which are:
DuodenumJejunumIleumThe small intestine is also the area where food nutrients are absorbed into the bloodstream through structures known as villi to ensure adequate functioning of the body system.
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What represents chargaff's discovery about the amounts of the nitrogenous bases a, g, c, and t in the dna molecule?
The revelation made by Chargaff regarding the proportions of the nitrogenous bases A, G, C, and T in the DNA molecule is
amount T = amount A;amount of G= amount of CHow did Chargaff get to his conclusion?Chargaff carried out a number of tests to examine the possibility that DNA functions as the gene's main building block. He separated cells' nuclei using fractionation. After separating the DNA from the nucleus, he disassembled it into its individual nucleic acids.When did Chargaff discover what he done?He discovered that the amounts of adenine, thymine, cytosine, and guanine in DNA were essentially the same in 1950. Later, this was referred to as the first Chargaff rule.
What is the first rule of Chargaff?A (adenine) equals T (thymine) and G (guanine) equals C (cytosine) in samples of duplex DNA.
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What 3 things can be found in a scientific argument? in geology on mars
PLEASE HELP I NEED TO SUBMIT SOON
Answer: composition, structure, history, and physical processes that shape the planet
either one of those
a drug like nicotine that produces a biological response in the brain is called a(n) .
A drug like nicotine that produces a biological response in the brain is called an dopamine agonist. Nicotine enters the brain within seconds of taking a cigarette. Nicotine promotes the release of brain chemicals known as neurotransmitters, which help regulate mood and behavior. Nicotine is a hazardous and extremely addicting substance.
It can increase blood pressure, heart rate, blood flow to the heart, and promote brain artery constriction (vessels that carry blood). Nicotine may also contribute to artery wall hardening, which may lead to a heart attack. Nicotine is a stimulant substance that speeds up the transmission of messages between the brain and the body.
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How does the change in free energy differ between exergonic and endergonic reactions?
he change in free energy difference between exergonic and endergonic reactions are: Exergonic reactions release energy which leads to a loss of free energy and Endergonic reactions consume energy which leads to a gain of free energy.
Differentiate between Exergonic and Endergonic reaction?The exergonic reactions are spontaneous reaction, whereas endergonic reactions are usually non-spontaneous reaction. During exergonic reactions, the energy is formed or released whereas, during the endergonic reactions energy is absorbed. During exergonic reactions, the value of energy is less than zero whereas, in endergonic reactions, the value of Gibb's free energy is greater than zero. The sign for exergonic reactions is usually negative, whereas the sign for endergonic reactions is positive. The exergonic reactions are generally favorable, whereas unfavorable reactions take place in endergonic reactions. During endergonic reactions, the entropy decreases, whereas the entropy increases during exergonic reactions.
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Please give a short explanation about suspension, colloids, and, solutions.
Answer:
A suspension is a mixture containing small insoluble particles evenly distributed in a fluid but a colloid is a non uniform mixture of a solute and a solvent in which the particles are permanently suspended also a solution is a uniform mixture of a solute and a solvent
1 Identify the tonicity of each cell.
2 Identify where the concentration is highest in each cell
3 Tell the rate of movement in each cell
4 Explain the factors that could be causing the changes in tonicity.
Please Help ASAP,
1) The first cell is in a hypertonic solution, the second cell is in isotonic solution while the third cell is in hypertonic solution.
2) The concentration is highest in the first cell.
3) There is movement of water out from the first cell, there is no net movement of water in the second cell and there is movement of water into the third cell.
4) Increase in solute concentration.
What is cell tonicity?Cell tonicity is defined as the effects of extracellular solution on the osmotic gradients that us formed against cells that are associated with them.
There are different types of cell tonicity which include the following:
Hypertonic solution: This is the solution that contains more solutes than the solvent of the solution leading to the movement of water from the cell to the outside extracellular solution. It causes shrinking of the cell.Isotonic solution: The net solute concentration of the extracellular solution is the same with the cells.Hypotonic solution: This is the solution that contains less solutes than the solvent of the solution leading to the movement of water from the extracellular solution into the cell. It causes swelling the cell.Learn more about cell here:
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A patient is being tested for a hematological neoplasm. which finding(s) would be present in the patient if he or she tests positive for the neoplasm? select all that apply.
A patient is being tested for a hematological neoplasm. If he/she tests positive for neoplasm, there would be:
Increased proliferation of abnormal lymphocytes.Increased clotting time.What is hematological neoplasm?Hematological neoplasm is a neoplasm arising from hematopoietic cells found in the bone marrow, peripheral blood, spleen (organs of the hematopoietic system) and lymph nodes. Hematologic neoplasms comprise of multiple malignant diseases derived from cells of myeloid or lymphocytic hematopoietic lineages. Hence, classification of these disorders is primarily based on the hematopoietic lineage into lymphoid and myeloid neoplasms.
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A seed is a fertilized and mature (A.ovary, B.fruit, C.ovule, D.egg), consisting of an embryo or two coytyledons.
Answer: D. Egg
Explanation:
A fertilized egg becomes a seed.
A homeostatic imbalance that activates these bone cells would lead to a loss of bone density.
Answer:???
Explanation:
In the gram-positive bacterial cell wall, the tetrapeptides that extend from the peptidoglycan layers are linked by?
In the gram-positive bacterial cell wall, the tetrapeptides that extend from the peptidoglycan layers are linked by Peptide interbridges
The tetrapeptides can be directly cross-linked to one another, with the D-alanine on one tetrapeptide binding to the L-lysine/ DPA on another tetrapeptide. In many gram positive bacteria there is a cross-bridge of five amino acids such as glycine (peptide interbridge) that serves to connect one tetrapeptide to another
What are gram positive bacteria ?A lipopolysaccharide-containing outer membrane surrounds the peptidoglycan cell wall that encases gram-negative bacteria. Instead of having an outer membrane, Gram-positive bacteria are surrounded by layers of peptidoglycan that are much thicker than those seen in Gram-negative bacteria.
Christian Gram, a bacteriologist, developed a test in 1884 that could tell whether a bacterium possessed peptidoglycan, a thick membrane that resembled a meshwork. Gram positive bacteria have thick peptidoglycan. Thin peptidoglycan layers are indicative of gramme negative bacteria.Learn more about Gram positive bacteria here:
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The __________ of the sperm contains enzymes involved in the penetration of the egg.
The acrosome of the sperm contains enzymes involved in the penetration of the egg.
By utilizing this maternal investment, the sperm is enhanced to spread the paternal genes; typically, it is extremely motile and streamlined for speed and efficiency during the task of fertilization. Only a small percentage of the billions of sperm generated during a human male's reproductive life actually succeed in fertilizing an egg due to intense competition amongst them. The tail, which directs the sperm to the egg and aids in its penetration of the egg coat, and the head, which houses a condensed haploid nucleus, are the two morphologically and functionally separate sections that typically makeup sperm. Because of the highly close packing of the DNA in the nucleus, transcription is stopped and its volume is reduced for transport.
Many sperm lack the somatic cell histones and instead have simple, extremely positively charged proteins called protamines packed within their chromosomes.
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The bacteria in a petri dish increases according to continuous exponential growth model, with a growth rate of 1.2% per hour. How much bacteria will you have after 24 hours from an initial sample of 2000 bacteria?
The number of bacteria growth after 24 hours is determined as 2,663 bacteria.
Number of bacteria after 1 hourThe number of bacteria growth after 1 hour can be calculated using the rate equation.
N(t) = N₀(1 + r)^t
where;
r is the rate = 1.2% = 0.012t is time = 24 hoursN₀ is the initial numberN(24) = 2000(1 + 0.012)^24
N(24) = 2,663 bacteria
Thus, the number of bacteria growth after 24 hours is determined as 2,663 bacteria.
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He large protein complexes that are major protein-digesting organelles are _________
The large protein complexes that are major protein-digesting organelles are proteasomes.
What is proteasomes?Protein complexes called proteasomes use the chemical mechanism known as proteolysis to break down unwanted or damaged proteins. Proteases are an enzyme class that aids in these processes. A key method by which cells control the concentration of specific proteins and destroy improperly folded proteins includes proteasomes. All eukaryotic, archaea, and certain bacteria contain proteasomes. Proteasomes are found in the cytoplasm and nucleus of eukaryotes. Numerous physiological activities, such as the cell cycle, the control of gene expression, and reactions to oxidative stress, depend on the proteasomal degradation pathway.Learn more about the Proteasomes with the help of the given link:
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All other things staying the same, a high growth firm will have a relatively ______ need for external financing than a low growth firm.
All other things staying the same, a high growth firm will have a relatively lower need for external financing than a low growth firm.
What is Financing?This is defined as the various ways and methods in which funds are provided or raised for various types of activities such as business activities, investments etc.
A high growth firm will have a relatively lower need for external financing than a low growth firm because the available resources will be sufficient enough for the daily operations of the company. This is therefore the reason why it was chosen as the most appropriate choice.
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Muscular exercise presents a dramatic test of the body's homeostatic control systems because it results in large _____.
Muscular exercise presents a dramatic test of the body's homeostatic control systems because it results in large amounts of heat production.
Homeostatic control systems- A body's physiological ability to maintain a steady internal environment in response to changes in the external environment is known as homeostasis.
Heat Production- The term "thermogenesis" refers to the process through which energy is lost by producing heat with specialization.
Energy- In biology, cells frequently store energy in macromolecules, especially lipids and carbohydrates (sugars). When chemical bonds are formed, such as during the redox reactions of cellular aerobic respiration, energy is released.
Redox Reactions- A reaction that happens when an oxidizing material and a reducing substance come into contact.
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11. Name the tissue type.
12. What is its function?
The tissue is simple squamous epithelial cell. It helps in diffusion of gases and exchange of nutrients in the body.
What are squamous epithelial cells?Squamous epithelial cells are the type of simple epithelial cells, made up of single layer of cells. They are flat, thin and polygonal in shape. They are arranged in a single layer on a basal membrane. Squamous cells have nucleus in the centre.
These cells are present in the lining of the alveoli in lungs and in the glomerulus in nephrons. They facilitate gaseous exchange in alveoli. In glomerulus they help in exchange of nutrients and elimination of wastes from blood capillaries.
Thus, squamous cells have important function of transport and absorption in the body.
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Ollowing a disturbance, the climate of an area will always lead to repopulation by the same animal, plant, fungus, and bacterial species, a group collectively referred to as a(n) __________ community.
The climate of an area will always lead to repopulation by the same animal, plant, fungus, and bacterial species, a group collectively referred as Climax Community.
What is climax community?
A community of plants, animals, and fungi that have attained steady state through the process of ecological succession in the growth of the vegetation in an area over time is referred to in scientific ecology as a climax community or climatic climax community.
Because the climax community is made up of species that are best adapted to the region's typical conditions, it was believed that this equilibrium would emerge.
The climax community's species composition doesn't change since all of the existing species are able to reproduce, whereas invasive species are unable to establish a presence. The climax stage is not entirely permanent since ecological processes, evolutionary processes, and climate changes all alter the environment over extremely long stretches of time.
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The vascular bundle in the shape of a single central cylinder in a root is called the?
The vascular bundle in the shape of a single central cylinder in a root is called the Stele.
Vascular bundles provide the following purposes: 1. Xylem: It is essential for delivering water-related elements to various areas of the plant. 2. Phloem: This tissue is in charge of delivering nutrients and food to the plant. 3. Cambium: By producing new xylem and phloem, it contributes to secondary growth in plants.A group of fundamental tissues found in the stem of a plant that includes cambium, xylem, and phloem. The procambium of the developing stem is where the vascular bundles grow. In the monocotyledons, vascular bundles are scattered throughout the stem in intricate configurations.The major vascular system of the plant axis and its accompanying ground tissues make up the plant stele.To learn more about Vascular bundles.
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The fragile and tiny cell mass that is composed of cells from the duplicated, divided, and differentiated zygote is called?
The fragile and tiny cell mass that is composed of cells from the duplicated, divided, and differentiated zygote is called blastocyst.
Zygote is the first cell formed after the fertilization of the male and the female gamete. It is a diploid cell that has the potential to give rise to a complete organism. It is the first developmental stage of an organism's life.
Blastocyst is the stage of the embryo that occurs due to certain number of cell division. it emerges on the 5th or 6th day after fertilization. The blastocyst consists of the inner cell mass that develops into the embryo, a blastocoel cavity and an outer layer called trophectoderm.
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The digestive system codes include sites from the mouth to the anus, as well as the?
The most important organs that make up the digestive system (so as in their function) are the mouth, esophagus, stomach, small intestine, big intestine, rectum and anus.
Helping them alongside the manner are the pancreas, gall bladder and liver. Here's how those organs paintings collectively on your digestive system.The GI tract is a sequence of hole organs joined in a long, twisting tube from the mouth to the anus.
The hole organs that make up the GI tract are the mouth, esophagus, stomach, small intestine,large intestine, and anus. The liver, pancreas, and gallbladder are the stable organs of the digestive system.
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Help?
Hydrogen bonds in between water molecules are one of the reasons water has a high heat of vaporization.
True or False
Answer:
Itss trueeeeee
Explanation:
The energy required to break multiple Hydrogen bonds causes water to have a high heat of vaporization. A large amount of energy is needed to convert liquid water, where the molecules are attracted through their hydrogen bonds, to water vapor, where they are not.
Who rediscovered Aristarchus's model of a heliocentric solar system?
Copernicus
Galileo
Kepler
Ptolemy
Answer is:
Copernicus
Explanation:
The fluid-mosaic model is ultimately the best depiction of the cell membrane because:________
The fluid-mosaic model eventually provides the most accurate representation of the cell membrane since it demonstrates that the layers' phospholipids and proteins can migrate.
What does "fluid mosaic model" mean?According to the fluid mosaic theory, phospholipids, cholesterol, and proteins are only a few of the components that are constantly flowing through the cell membrane.
This movement helps the cell membrane maintain its role as a barrier dividing the inner and external environments of the cell.
Who provided a model of a fluid mosaic?Singer and Nicolson proposed the fluid mosaic theory in the early 1970s. This paradigm states that lipids, proteins, and carbohydrates make up membranes.
The fluid mosaic model is mosaic because of what?According to the fluid mosaic concept, the plasma membrane is made up of a variety of elements, including phospholipids, cholesterol, proteins, and carbohydrates, which give the membrane its fluid appearance.
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Groups of three or more monomers are called ____________ and include ____________ .
Groups of three or more monomers are called polysaccharides, starch and include short-term storage. Monomers are small molecules, mainly organic, that can combine together to produce larger molecules, or polymers. All monomers can form chemical connections with at least two other monomer molecules. Monomers are small molecules, mainly organic, that can combine together to produce larger molecules, or polymers.
All monomers can form chemical connections with at least two other monomer molecules. Sugars, amino acids, fatty acids, and nucleotides are the four main forms of monomers. Each of these monomer kinds is essential to the survival and evolution of life, and each can be generated abiotically.
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If a stimulus is presented repeatedly, followed by no other stimulus, the animal will gradually stop responding. this is known as ____.
The animal will eventually stop responding if the same stimulus is repeatedly provided without being followed by another stimulus. This is known as habituation.
Describe the habituation process:Habituation is a psychological learning process whereby a stimulus's ability to elicit a response decreases over time. According to this theory, a person or an animal might learn to disregard.
What is an example of a habituation?For example, a new sound could first attract your attention or perhaps distract you from what is going on around you. Your response will decrease as you grow accustomed to this sound and give it less attention. Due to repeated exposure, this decreased response is a stimulus that has become habit-forming.
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_____is defined as the exchange of gases between a living organism and its environment.
Answer: Respiration
Explanation: Respiration is the process in which organisms exchange gases between their body cells and the environment. From prokaryotic bacteria and archaeans to eukaryotic protists, fungi, plants, and animals, all living organisms undergo respiration. Respiration may refer to any of the three elements of the process.
1 cm³ of water is equal to how many liters of water?
Answer:
0.001
Explanation: