secretory vesicles
Lipophobic molecules that are to be released by cells are stored in membrane-bound structures called secretory vesicles.
What is a secretory vesicle?The secretory vesicle is a type of vesicle that facilitates the delivery of cargo, such as hormones or neurotransmitters, from an organelle to particular locations on the cell membrane, where it docks and fuses to release its contents.What roles does the secretory vesicle play?Along with transport, secretory vesicles have the ability to store and breakdown some released compounds. Neurotransmitters are found in synaptic vesicles. Through secretory vesicles, hormones can be delivered into the bloodstream.Secretory vesicles are produced where?In response to extracellular signals, secretory vesicles that originate from the trans Golgi network exocytose their contents to the cell's exterior. A protein or a tiny molecule, like histamine, can be the released product (such as a hormone or digestive enzyme).
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Which evolutionary mechanism changes genotype frequencies but does not change allele frequencies?
Assortative mating is the evolutionary mechanism that changes genotype frequencies but does not change allele frequencies.
Assortative mating is the type where two individuals mate with each other on the basis of their similarities and dissimilarities. This is a different phenomenon than the random mating that occurs by chance. Assortative mating can be used to increase the number of organisms of a population containing a certain trait.
Allele is the alternative form of a gene. It arises due to mutations. A gene can have more than one types of alleles. However, usually a gene only has one allele. The alleles are found at the same location of the homologous chromosomes.
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What is the main idea of this text?
Shirley Chisholm was born in Brooklyn, New York and was the child of two immigrants, and she excelled on her debate team early on in her life.
Shirley Chisholm spent her political career fighting for the rights of women, people of color, and poor people in many different political seats, even though she didn’t win the Presidential nomination for the Democratic party.
When Shirley Chisholm ran for President, many other Democratic candidates encouraged her to step down because they said she wasn’t a “serious” candidate.
Shirley Chisholm ran for the New York State Legislature and represented her district in Brooklyn, and she proposed bills to increase funding for daycare and schools.
The main idea of this text is that Shirley Chisholm, a trailblazing African American politician (1924–2005), started her career as a teacher. Chisholm was the first African American elected to Congress in 1968. She served on the Education and Labor Committee and was instrumental in establishing the Black Caucus.
She once more made history in 1972 when she ran for president as the first Black woman of a major party. Chisholm left from politics after spending seven terms in the House to pursue a career as a teacher and public speaker.
As the first Black congresswoman, Chisholm began her first of seven terms in office in 1969. She stunned many by asking transfer after initially being placed to the House Forestry Committee. .
When Chisholm sought the Democratic candidacy in 1972, she became the first African American woman to run for president of the United States. Throughout her time in Congress, Shirley Chisholm advocated for equal access to education and jobs for minorities while simultaneously speaking out against the draft. She left Congress in 1983 and became well-known on the lecture circuit while teaching at Mount Holyoke College.
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The primary anabolic hormone is:____.
a) cortisol.
b) epinephrine.
c) glucagon.
d) insulin.
The primary anabolic hormone is:
d) insulin
How do hormones work?
The Oxford dictionary defines a hormone as "A regulatory substance produced in an organism and transported in tissue fluids such as blood to stimulate specific cells or tissues into action." In essence, a hormone is a message sent by an organ to our body, causing changes. Anabolic and catabolic hormones are the key hormones to consider when it comes to athletic performance.
An anabolic hormone is what?
According to Kids Health.org, anabolic supplements, commonly referred to as anabolic steroids, are hormones created intentionally. The purpose of these artificial hormones is to mimic the effects of androgens, a type of male sex hormone. The adverse effects of anabolic pills are many and extremely dangerous.
What hormone is the main anabolic one?
Testosterone, growth hormone, and insulin-like growth factor are three of the key anabolic hormones.
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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.
In the __________, the reproductive cycle entails alternation of generations; a spore-producing generation alternates with one that produces eggs and sperm.
Answer:
In the ferns, the reproductive cycle entails alternation of generations; a spore-producing generation alternates with one that produces eggs and sperm.
Explanation:
A fern is a specific type of vascular plant which reproduces through spores rather than seeds or flowers. Ferns are plants with roots, stalks, and leaves, much like blooming plants. Unlike blooming plants, unfortunately, ferns lack flowers and seeds and rather than reproduce sexually by secreting microscopic spores or occasionally by vegetative means, as is the case with the walking fern.
In previously, many vascular plants that yield spores were loosely classed with ferns and referred to as "fern allies." Surprises concerning the connections between ferns and their companions have been revealed by recent genomic investigations. First, ferns and horsetails seem to have a lot in common. Horsetails are really now included in the fern family. Second, the flora club moss as well as quillworts, which are sometimes referred to as "fern allies," are in no way related to ferns.
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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.
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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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
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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When performing a ____________________ and the f2 generations yield significantly different results, it is likely that the trait is sex linked.
When performing a reciprocal cross and the F2 generations yield significantly different results, it is likely that the trait is sex-linked.
Reciprocal cross is the one where the genotype of the male and the female parent are interchanged. This cross is performed to check for the importance of genotype of parents on an inheritance pattern. The genotype must be homozygous for this cross to be conducted.
Sex-linked refers to the genes affecting any certain trait that are expressed on the sex chromosome. In humans, these kind of genes are mostly present on the X-chromosome. The expression of such genes depends upon the genotype of the parents completely.
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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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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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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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It is possible for a repressor to negatively regulate the expression of an operon because?
It is possible for a repressor to negatively regulate the expression of an operon because option(c) i.e, the repressor binding site overlaps the promoter site of the operon allowing it to physically block the binding of RNA polymerase.
An operon is a collection of genes that are all translated into a single messenger RNA (mRNA) molecule, which in turn encodes a number of different proteins (Fig. 16.11). In prokaryotes, this type of polycistronic mRNA is commonly seen.
This characteristic enables coordinated control of protein production in response to cellular requirements. The operon enables the cell to conserve energy, which is a crucial component of an organism's life strategy. It does this by giving the cell the tools to create proteins only when and where they are needed.
operon, a genetic regulatory system present in bacteria and their viruses and characterized by the clustering along the DNA of genes encoding functionally related proteins. This characteristic enables coordinated control of protein production in response to cellular requirements.
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The complete question is:
It is possible for a repressor to negatively regulate the expression of an operon because:
a. the repressor induces the expression of inducer.
b. one of the genes expressed in the operon negatively regulates the repressor.
c. the repressor binding site overlaps the promoter site of the operon allowing it to physically block the binding of RNA polymerase.
d. the repressor binding site on the DNA overlaps with the translation start site.
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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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.
The collection of all the genetic material (the dna) in a cell or organism is called the:_________
genome
The collection of all the genetic material (the DNA) in a cell or organism is called the genome.
The total collection of DNA instructions present in a cell makes up the genome. The human genome is made up of 23 pairs of chromosomes that are found in the cell's nucleus and one tiny chromosome that is found in the mitochondria. Everything a person needs to grow and operate is encoded in their genome.What makes the genome significant?Three billion base pairs of DNA make up the whole human genome, which is uniquely structured to give us our basic anatomy and unique traits like height and hair color. Understanding how genes function is essential for understanding how our bodies function and what occurs when we are ill. Genes are formed by DNA.To learn more about genome visit:
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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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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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Metastasis is enabled by __________. the nervous system the lymphatic system the circulatory system both the lymphatic and circulatory
Answer:
Epithelial-Mesenchymal Transition, Anoikis and Loss of Adhesion
Explanation:
The spread of cancer cells from the place where they first formed to another part of the body. In metastasis, cancer cells break away from the original (primary) tumor, travel through the blood or lymph system, and form a new tumor in other organs or tissues of the body.
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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Briefly explain the overall processes of photosynthesis and cellular respiration.
The amount of air exchanged at rest is called? a. vital capacity b. total lung capacity c. expiratory reserve volume d. tidal volume e. inspiratory reserve volume
The amount of air exchanged at rest is called Tidal volume
Lung volumes or respiratory volumes is the volume of gas in the lungs during a respiratory cycle. there are four types of respiratory volumes tidal volume, inspiratory reserve, expiratory reserve and residual volume.
The tidal volume is the total amount of the air that moves in or out of the lungs with each respiratory cycle in normal condition. It is around 500mL. It is an important clinical parameter for proper ventilation to take place.
Inspiratory reserve volume is a supplementary volume which could be effectively inhaled after the inspiration of a standard tidal volume. It is about 2500- 3100 ml.
Expiratory reserve volume is the additional capacity of air which can be forcibly expelled exhaled after normal expiration. It is around 1200 ml.
Residual volume is the volume of air residing in lungs after expiration. It is around 1100- 1200 mL.
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When a body has had adequate rest and no food for at least 12 hours, it is said to be in?
When the human body has had adequate rest and no food for 12 hours, it is said to be in the basal state.
What is the basal state?The phrase "basal metabolic rate" (BMR) refers to the overall level of activity of a person's body metabolism as measured by his oxygen consumption in the basal state, which is when the person is completely at rest but not asleep, 14 to 18 hours after eating. The body's oxidative process is more active and the rate of metabolism is higher the more oxygen is used in a certain period of time.
The general metabolic state during treatment has been measured using the BMR. Since thyroid hormones are the main regulators of tissue oxidation and metabolism, BMR measurements were once frequently used to evaluate thyroid function. However, with the development of radioactive-isotope tests and thyroid hormone studies, their use has decreased.
Therefore, the body is said to be in the basal state.
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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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The pharmacokinetic measurement of plasma volume that is completely cleared of a drug per unit of time is termed?
The pharmacokinetic measurement of plasma volume that is completely cleared of a drug per unit of time is termed as drug clearance.
Pharmacokinetics is defined as the study of the effect of any administered substance like drug or any form of medication into the body. There are four steps for the pharmacokinetics: absorption, distribution, metabolism, and excretion.
Plasma is the fluid present in the blood. It is a colorless liquid consisting of various proteins, fats and other substances. It makes up about 55% of blood's volume. It is the means of transport for the body. Plasma also consists of various immune cells.
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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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Who rediscovered Aristarchus's model of a heliocentric solar system?
Copernicus
Galileo
Kepler
Ptolemy
Answer is:
Copernicus
Explanation:
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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Hi can someone please help me with this!
Experiment refer to a manner in which we can be able to establish the relationship between a dependent and an independent variable.
What is an experiment?The term experiment refer to a manner in which we can be able to establish the relationship between a dependent and an independent variable. We have two different experiments and we shall treat them individually.
Experiment A
Independent variable - Remedy for the knee problem
Dependent variable - Degree of relief from the knee problem
Control group - Patients that received the placebo
Experiment B
Experimental variable -Effect on the deer
Independent variable - Whether or not tiger urine is used
Dependent variable -Repulsion of deer from tree seedlings
Control group - Tree seedlings not treated with tiger urine
Controlled variables - Type of seedlings, specie of deer and tiger
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