Sensor, integrating center, and effector roles do the pancreatic islets play in the negative feedback control of blood glucose levels.
Pancreatic Islets- Our pancreas contains clusters of cells known as pancreatic islets, commonly referred to as islets of Langerhans. The pancreas is the organ that produces hormones to aid in the digestion and use of food by the body. The beta cells that produce the hormone insulin are among the several cell types found in islets.
Insulin- A hormone produced by the pancreatic islet cells. By delivering sugar to a cells, where it may be utilized by the body to provide energy, insulin regulates the quantity of glucose in the blood.
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Regular distribution is observed for many organisms due to _______. a. the need to maximize exposure to sunlight b. the need to avoid predators c. interactions between individuals d. the plentiful availability of water please select the best answer from the choices provided a b c d
Answer:
The answer is C.
Explanation:
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Compared with ³¹P , the radioactive isotope ³²P has a. a different atomic number. b. one more proton. c. one more electron. d. one more neutron.
Compared with ³¹P , the radioactive isotope ³²P has one more neutron.
Radioactive isotopes is an unstable element form which breaks down into simpler form releasing the energy in the form of radiation to become more stable.
They usually have short life span and decay to stable form hence they are present only in small quantities.
Radioactive isotope of P-32 have 15 protons, and 17 neutrons while the common isotope of P-31 have 15 protons and 16 neutrons.
Radioactive P-32 have application in laboratory to label DNA and proteins to treat various diseases.
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How is a mailing address analogous to biology's hierarchical taxonomic system?
Mailing address analogous to biology's hierarchical taxonomic system is written going from broader to narrower.
How is a mailing address analogous to biology's hierarchical taxonomic system?
Postal addresses are analogous to the hierarchical taxonomic system of biology in that each unit has a unique identifier. In postal addresses, the units are houses, and each of them belongs to a certain street in a certain suburb of a certain city. In taxonomy, the units are species and each of them belongs to a certain genus of a certain family of a certain order of a certain class. No two species have exactly the same taxonomic names, just as no two houses will have the same address.To learn more about mailing address analogous, refer to:
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Which best describes the role of communication in scientific investigations?
O Communication can help identify good scientific questions to further investigate.
O Communication is not necessary once the data are collected because the scientists can d
themselves.
O Communication should not be used in planning the experimental design because the scien
ideas.
O Communication is important because the scientists need to convince other researchers not to challenge their results
Answer:
Communication can help identify good scientific questions to further investigate.
Explanation:
Which of the following is not a major activity of the stomach? a. mechanical digestion b. HCl production c. nutrient absorption d. enzyme secretion
c. nutrient absorption is not a major activity of the stomach
What is the stomach's main function?Acid and digestive enzymes are produced by the stomach. The stomach is lined with , which are ridges of muscular tissue. Periodically contracting, the stomach muscles churn the food to speed up digestion. Food can go from the stomach to the small intestine when the pyloric sphincter, a muscle valve, relaxes.
Propulsion—peristaltic smooth muscle contractions that move food from the fundus to the constricted pylorus—is how mechanical digestion happens in the stomach.
As the muscular layers in the stomach lining flex, a mixing and churning action is created, which is mechanical digestion.
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How is habitat disturbance absolutely necessary for the long-term survival of the woodpecker?
The habitat destruction leads to urbanization and increase in richness of woodpecker species.
In urban settings, woodpeckers are relatively frequently recorded. Their habitat preferences and the habitat quality of the territories found in an urban matrix are not, however, thoroughly investigated. Urbanization may lead to the depletion of dead wood resources, which are essential for the existence of woodpeckers. Dead wood resources, which generally took the form of dead tree limbs, were a key factor in the richness of a society.
Municipal greenery offers very few dead wood supplies, hence woodpeckers stayed away from this type of habitat. Studies revealed a correlation between species abundance and the availability of dead wood and canopy covering. According to certain research, less tended urban green spaces are essential for the presence of woodpeckers, and management of urban greenery is a significant factor that affects woodpecker assemblage.
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PLease please please help i really need this
In humans the kidneys control the amount of water, salts and other solutes leaving the body by sieving blood through their millions of twisted tubules. When a person drinks too much water in a short period of time, the kidneys cannot flush it out fast enough and the blood becomes waterlogged. Drawn to regions where the concentration of salt and other dissolved substances is higher, excess water leaves the blood and ultimately enters the cells, which swell like balloons to accommodate it.”
How could the process of osmosis explain this phenomenon? Support your answer with evidence from the text above.
Type your answer in the space below
Water molecules moves from the diluted blood to cells where there are more dissolved solutes across the cell membranes through the process of osmosis.
What is osmosis?
Osmosis is the process by which water moves across a semi-permeable membrane from regions of low solute concentration to regions of low solute concentration.
The movement of water molecules is down their concentration gradient as the fewer number of solute molecules in one region of results n water molecules moving across the semi-permeable membrane to where there are fewer water molecules.
When an individual takes in water more than the kidney can remove from blood at a given time, the water molecules moves from blood to cells where there are more dissolved solutes across the cell membranes through the process of osmosis.
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When dna fragments are separated using gel electrophoresis and transferred to a blot it is called a:____.
When DNA fragments are separated using gel electrophoresis and transferred to a blot it is called a southern blot.
In the field of molecular biology, we can define southern blot as a method through which a particular DNA fragment is detected from amongst a DNA sample.
The method of southern blotting has important uses such as the detection of diseases, for finding out a DNA segment in a DNA library.
In the method of southern blotting, the DNA sample is first cut by using restriction enzymes. Then the sample is run by the method of gel electrophoresis due to which the smaller segments move at a faster speed than a larger one along a matrix. The DNA segments are then transferred to a blot. The DNA is marked by a tag, referred to as a probe, using radioactive, fluorescent or any other technique. This tag will allow the detecting of our desired DNA segment when a complementary segment is run referred.
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Which type of cell has a cell wall?
A. Human skin cell
B. Animal cell
C. Fungi
D. Virus
Answer: Fungi
Explanation:
(Explanation from samiyah83)
Examples of organisms with cell walls are plants, fungi, protists (particularly molds and algae), and most bacteria (a few exceptions are mycoplasma and L-form bacteria) have cell walls. Animals and heterotrophic protists do not have cell walls.
If a culture of liver cells were deprived of amino acids, which category of macromolecule would the liver cells not be able to construct properly?.
The liver cells wouldn't be able to produce the macromolecules in the protein category adequately.
Describe a macromolecule:A macromolecule, such as a protein or nucleic acid, is a very big molecule crucial to biophysical processes. It is made up of many atoms that are covalently bound. The smaller molecules known as monomers are the building blocks of many macromolecules. More atoms make up macromolecules than there are in regular molecules.
What is the function of macromolecules?The job of macromolecules is to sustain structures. act as a repository for fuel to maintain and retrieve genetic data.
What is an example of a macromolecule?Proteins, nucleic acids, and polysaccharides are typical examples of macromolecules.
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When you breathe, oxygen moves from your lungs into your blood and then into tissues. To do this, oxygen moves across membranes by ______ and from ______ concentration of oxygen.
When you breathe, oxygen moves from your lungs into your blood and then into tissues. To do this, oxygen moves across membranes by diffusion and from higher to lower concentration of Oxygen.
What occurs after oxygen leaves the lungs and enters the blood?The air sacs' flimsy lining allows oxygen from the inhaled air to cross across and enter the blood vessels. Diffusion refers to this. The bloodstream then transports the oxygen in the blood throughout the body, allowing it to reach every cell. The bloodstream releases carbon dioxide as oxygen enters it.
Diffusion is the process of movement of molecules higher to lower concentrations.
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Three-chambered hearts with incomplete septa were once viewed as being less adapted to circulatory function than mammalian hearts. What advantage of such hearts did this viewpoint overlook?
Because some oxygen-depleted blood from the systematic circuit that was returned to the right ventricle would have mixed with the oxygen-rich blood in the left ventricle, the O2 level would be unusually low.
Why do certain animals' hearts have three chambers?Amphibians and reptiles have three chambers in their hearts for the following reasons: Their lower metabolic rates result in a lower oxygen need per litre of blood. A frog's heart, for example, contains three chambers: one ventricle and two atria.
What are the advantages of a three-chamber heart?A three-chambered heart is preferable to a two-chambered heart because it can exert greater pressure on the blood arteries to guarantee that oxygenated blood flows into the body and deoxygenated blood is sent to the lungs.
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The movement of water in and out of the renal tubules can be increased or decreased. the tubular cells are able to do this, by changing the number of water channels, also called?
The movement of water in and out of the renal tubules can be increased or decreased. the tubular cells are able to do this, by changing the number of water channels, also called Aquaporins.
Nephrons are the structural and functiona unit of kidney. It is divided into different parts like glomerulus, proximal convulated tubule, distal convulated tubule, loop of henle and collecting duct which performs different function of urine formation.
Renal tubule is the part of the nephron that consist of proximal convulated tubule, distal convulated tubule, loop of henle.
Renal tubules have water channels called aquaporins which helps in transporting water into the cell. They can increase or decrease the number of water channel to control the concentration of urine.
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jamuar, s.s., and walsh, c.a. (2015). genomic variants and variations in malformations of cortical development. pediatr. clin. north am. 62, 571–585.
Differences in the sequence of DNA among individuals are named genetic variation. Genomic variation describes some of the differences among people, such as eye color and blood group, as well as whether a person has a higher or lower risk for acquiring particular diseases
What stand genomic variants?
Genomic variation refers to DNA sequence distinctions among individuals or populations. Some variants affect biological function (such as a mutation that generates a genetic disease), while others have no biological consequences
What is the difference between interpretations and mutations?
Mutation and variation are two concurrent events involved in the process of evolution. The main difference between mutation and interpretation is that mutation is an alteration in the nucleotide sequence of a gene whereas variation is any distinction between individuals of a particular species.
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What is the purpose of all interactions among the components of a climate system?(1 point) to assist human activities such as shipping and farming to assist human activities such as shipping and farming to transport different species of animals around the globe to transport different species of animals around the globe to create various weather patterns on earth to create various weather patterns on earth to transfer thermal energy around the world
The main purpose of all interactions among the components of a climate system is to create various weather patterns on earth. So, the correct option is C.
The earth's surface is where several elements of the climate system come together. Modeling (or recreating) the climate system requires an understanding of its many sections or components.
This chapter outlines the fundamental elements of the Earth that make up the climate system, as well as the fundamental scientific concepts and vital procedures required to model each of these elements.
The Atmosphere, Ocean, Ice, and Land are some of these elements. Individual processes are often gathered into a model of one system component, with the climate system being depicted as a collection of building blocks.
To depict the overall climatic system, the components are connected to other components. The ability to construct a representation of the system, such as a climate model, depends on being able to comprehend and then depict the interactions between processes and between components.
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the white matter of the spinal cord contains . group of answer choices myelinated nerve fibers only unmyelinated nerve fibers only myelinated and unmyelinated nerve fibers soma that have both myelinated and unmyelinated nerve fibers
Option A: the white matter of the spinal cord contains myelinated nerve fibers only.
The central nervous system (CNS) comprises the brain and spinal cord. It generally contains two types of tissues: white matter and gray matter. White matter appears pinkish white while the gray matter is a darker hue. White matter is located in the outer regions of the CNS while the gray matter is located closer to the CNS.
The white matter of the central nervous system consists of myelinated nerve fibers. This further means that it contains axons that are covered by a protected covering of myelin. The characteristic color of white matter is acquired from myelin which is generally made up of lipid tissue. Myelin protects the nerve fibers from any injury.
The white matter of the spinal cord is composed of axons that are covered by myelin. The primary function of white matter is to coordinate and signal a to and fro motion between the brain and the spinal cord.
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Which of the following animals generally has the lowest volume of urine production? a. vampire bat b. salmon in fresh water c. marine bony fish d. freshwater bony fish
The following animals generally has the lowest volume of urine production
c. Marine bony fish
All bony fish have segmented fin rays that are derived from their epidermis and sutures in their neurocranium. Both bony fish and cartilaginous fish have gills for breathing, but the gills of bony fish are protected by a hard, bony plate. Bony fish may also have prominent rays, or spines, in their fins; this characteristic is known as a "operculum".
Bony fish, in contrast to cartilaginous fish, have swim or gas bladders to control their buoyancy. On the other hand, cartilaginous fish require constant swimming to maintain buoyancy.
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Predict the number of signals expected in the proton spin decoupled 13c spectrum of p-dibromobenzene (1,4-dibromobenzene).
2 number of signals is expected in the proton spin decoupled 13C spectrum of p-dibromobenzene (1,4-dibromobenzene).
It is well known that the proton spin decoupled 13C spectrum of p-dibromobenzene (1,4-dibromobenzene) should show two signals. However, it has been recently reported that only one signal is observed in this spectrum.
There are two possible explanations for this discrepancy. Firstly, it is possible that the p-dibromobenzene molecule is not actually proton spin decoupled. In this case, the spectrum would only show one signal because the proton and carbon spins would be coupled together.
Alternatively, it is possible that the molecule is proton spin decoupled, but that the 13C signal is very weak and is only detectable when the molecule is in a very high energy state. This would explain why only one signal is observed in the spectrum.
Further experiments are required to determine which of these explanations is correct. In the meantime, it is important to be aware that the proton spin decoupled 13C spectrum of p-dibromobenzene may not show the expected two signals.
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the fibrin clot begins to form when fibrinogen is cleaved resulting in a fibrin monomer, fibrinopeptide a, and fibrinopeptide b fragments. the fibrin monmers sponaneously polymerize due to hydrogen bonding, and then are covalently linked into fibrin polymers by which factor?
The factor involved in the process is Factor XIII.
What is clotting of blood?Blood is said to clot when a solid mass appears over the point where the skin has been injured. The appearance of a clot would stop the bleeding over the point that has been affected by the injury.
There are many biological factors that contribute to the clotting of blood. The fibrin clot begins to form when fibrinogen is cleaved resulting in a fibrin monomer, fibrinopeptide a, and fibrinopeptide b fragments. The fibrin monomers spontaneously polymerize due to hydrogen bonding, and then are covalently linked into fibrin polymers by Factor XIII.
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Many spontaneous reactions occur very slowly. Why don't all spontaneous reactions occur instantly?
Many spontaneous reactions occur very slowly and all spontaneous reactions occur instantly because if the spontaneous reaction has a high activation energy that is rarely attained, the rate of the reaction may be low.
What is a Spontaneous reaction?This refers to the type of reaction which proceeds on its own and favors the formation of the products without an external energy being added to the system.
In a chemical reaction, the activation energy which is the minimum amount of energy that must be provided for a chemical reaction to occur varies according to different factors.
In a situation whereby the spontaneous reaction has a high activation energy, it becomes difficult for it to be attained and the reaction is slower while if the activation energy is low then then it is easier for it to be attained and the reaction is faster.
This is therefore the reason why all spontaneous reactions won't occur instantly.
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The cell membrane is _______ (or selectively permeable), meaning it controls the passage of molecules in and out of the cell. p/orn
Answer: The answer is semipermeable
Explanation:
The unicellular glands that directly and specifically secrete mucus are also called ________ cells.
The unicellular glands that directly and specifically secrete mucus are also called goblet cells.
In order words, goblet cells are refers to unicellular glands which directly and specifically secrete mucus.
These goblet unicellular gland cell are of economic importance as they help in the production and maintenance of the protective mucus blanket by producing molecular glycoproteins called mucins.
Unicellular glandsThese are gland which functions only as a single gland and are characteristized by just single cells only.
So therefore, the unicellular glands that directly and specifically secrete mucus are also called goblet cells and are of great economic importance simply because they help in the production and maintenance of the protective mucus blanket by producing molecular glycoproteins called mucins.
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A medical student is trying to visualize how the structures that make up the
valves inside the heart are positioned. Which model would be the most useful
in this situation?
A. A computer model showing the path of a red blood cell through
the body
B. A physical model of the internal parts of the heart
C. A mathematical model showing how blood pressure changes as
the heart beats
D. A conceptual model comparing the heart to a pump
The cells that rhythmically and spontaneously generate action potentials in the heart are called ___
The cells that rhythmically and spontaneously generate action potentials in the heart are called pacemaker cells
The pacemaker cells are the ones that help in the maintenance of the action potential and that action potential work as an electrical clock that provides the automaticity to coordinate the pacemaker cells it divides the action potential into 4 phases among which in phase 4 the ion channels open that conducts slow, inward ( depolarizing Na+ ) currents and they are called as funny currents which cause the membrane potential to spontaneously depolarize, thereby initiating phase 4 and at the -50mV T type Ca 2 + channels open and further depolarize the cells and in some way, L type Ca+ channel opens when membrane reaches -40mV and this further results in the more Ca+ enter to depolarize the cell further until an action potential threshold is reached.
At phase 0 depolarization is primarily caused by increased Ca+ current through L-type channels that began to open toward the end of phase 4.. In contrast, the T-type channel's Ca+ current slows as these channels close and in phase 3 K+ channels open thereby increasing the outward directed hyperpolarizing K+ winds and decreases the inward of Ca+ and hyperpolarization takes place and then again enter in phase 4 hence the pacemaker cells maintain the action potential by dividing and circulating in 3 different phases.
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Which of the following is not properly paired? a. seminiferous tubule-cervix b. vas deferens-oviduct c. testosterone-estradiol d. scrotum-labia majora
The answer is the seminiferous tubule cervix.
What is a seminiferous tubule?
The seminiferous tubules offer a special setting for the development of germ cells. Germinal components and supporting cells are included in the structures engaged in this process. The Sertoli cells and the basement membrane's peritubular cells are examples of supporting cells. The germinal elements are made up of a population of epithelial cells, including spermatogonia, which proliferate quickly, spermatocytes going through meiosis, and metamorphosing spermatids. The "blood-testis barrier" is another habitat that is produced by the seminiferous tubule. Although the maturing germ cells in the testis are potentially antigenic and identifiable as foreign, no immune reactivity is often seen there. This makes the testis distinctive.
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What biological process allows humans, mammals, and birds to maintain high body temperatures?.
Answer:
Cellular Respiration
Explanation:
Cellular Respiration allows animals to generate energy by burning off fat. Cellular Respiration generates heat so that fat can be burned off.
A chicken has 78 chromosomes in its somatic cells. How money chromosomes did the chicken inherit from each parent? How many chromosomes are in each of the chicken's gametes? How many chromosomes will be in each somatic cell of the chicken's offspring?
If a chicken has 78 chromosomes in its somatic cells, then it has inherited half the number of chromosomes from each parent i.e 39 from each parent. There are 39 chromosomes in each of the chicken's gamete. There will be 78 chromosomes in each somatic cell of the chicken's offspring.
The gamete cells divide by the process of meiosis whereas the somatic cells divide by the process of mitosis.
During the process of meiosis, the number of chromosomes is reduced to half. Hence, the gamete cells contain half the number of chromosomes as the somatic cells. If fertilization occurs, the other half of the number of chromosomes is inherited from the other parent. Hence, a chicken will inherit half the number of chromosomes from each parent.
Somatic cells in the body divide by the process of mitosis. The process of mitosis produces genetically identical copies. Hence, the chromosome number will remain the same i.e 78 in the somatic cell of the chicken's offspring.
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Which is an abiotic factor? a a polar bear on an ice floe b a forest of deciduous trees c fungi and moss on a rotting log d an ocean current of cold water
The abiotic factor is (d) an ocean current of cold water.
Abiotic factor are those that do not perform the basic processes of life. These processes are: respiration, excretion, digestion, movement and reproduction. Although these factors do not perform any life processes, yet they are essential for the environment and the living organisms to sustain. The examples are: water, sunlight, soil, rocks, etc.
Ocean currents are the movement of ocean water. This movement is regulated by several factors like gravity, direction of wind, density of water, climate, etc. The ocean water can have movement in two directions: vertical and horizontal.
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rearrange the list of structural hierarchy in the body in order of complexity, so that the least complex level is first and the most complex is last.
structural hierarchy in the body in order of complexity, so that the least complex level is first and the most complex is last
Atom, Cell, Tissue, Organ, Organ System, Organism
The human body's biological functions are preserved at several levels of structural organization. The following levels are included: chemical, cellular, tissue, organ, organ system, and organismal. Organizational hierarchy is built up from lower levels. Therefore, molecules combine to create molecules, molecules create cells, cells create tissues, tissues create organs, organs create organ systems, and organ systems create beings
structural hierarchy is very helpful in studying the characteristics of the organisms.
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question which hormones does the body release under stress? estradiol and luteinizing hormone estradiol and luteinizing hormone estrogen and progesterone estrogen and progesterone epinephrine and norepinephrine epinephrine and norepinephrine insulin and prolactin insulin and prolactin
epinephrine and norepinephrine hormones the body release under stress
What hormone produced by the adrenal gland is involved in the stress response?The adrenal medulla, the innermost region of the adrenal gland, regulates the chemicals that trigger the flight or fight response. The adrenal medulla secretes two primary hormones: epinephrine (adrenaline) and norepinephrine (noradrenaline), which have comparable roles.
Cortisol is known as the stress hormone because it is implicated in stress responses. It raises blood sugar, raises blood pressure, and lowers immunological responses.
Cortisol influences various parts of your body, primarily regulating your body's response to stress.
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Answer: epinephrine and norepinephrine hormones the body release under stress
Explanation: When brain go brrr, its makes these chemicals so brain can stop going brrr.