the first thing that stops a contraction after the nerve stops sending ach is: a. ache destroys the ach, and it is removed from the membrane receptors. b. the tropomyosin blocks the myosin. c. calcium ions return to the terminal cisternae. d. the action potential stops going down the t tubule.
Answers
The first thing that stops a contraction after the nerve stops sending ACh is Option (a), acetylcholinesterase destroys the ACh, and they are removed from the membrane receptors.
When the nerve stops sending acetylcholine (ACh) at the neuromuscular junction, acetylcholinesterase (AChE) comes into action. Acetylcholinesterase is an enzyme that is present in the synaptic cleft between the motor neuron and the muscle fiber.
Acetylcholinesterase rapidly breaks down acetylcholine into choline and acetate. This breakdown occurs in the synaptic cleft, where ACh is released to transmit the nerve signal to the muscle fiber.
By breaking down acetylcholine, acetylcholinesterase ensures that the ACh molecules no longer occupy the membrane receptors on the muscle fiber. This process effectively stops the continued stimulation of the muscle fiber by ACh.
As a result, the muscle fiber ceases to receive the signal for contraction, and the muscle relaxation process begins. The removal of ACh from the membrane receptors allows the muscle fiber to return to its resting state.
Therefore, the first thing that stops a contraction after the nerve stops sending ACh is the action of acetylcholinesterase, which destroys ACh and removes it from the membrane receptors on the muscle fiber.
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Related Questions
What releases oxygen into the atmosphere?
Answers
Answer: plants
Explanation: it’s simple, photosynthesis
Many evolutionists have performed experiments to try to produce living things from common chemicals. All of these experiments have failed. What evolutionary idea are these experiments trying to prove? Tree of life abiogenesis recapitulation gradualism
Answers
Answer:
abiogenesis
Explanation:
Abiogenesis is the idea that supports the thought that the emergence of life is associated with the non-living things. It is believed that initially, the structure of the formation of life was simple. With further process, it turned to be complex. According to this hypothesis, the non-living matter of the Earth gave birth to the living matter.
In the given excerpt, the experiment performed by the evolutionists by using chemicals is an example of abiogenesis.
PLS HELP FOR MY EARTH SCIENCE CLASS?!?
The right atmospheric composition is another key component for a
planet to sustain life.
Which telescope holds a promising future in our quest for Earth 2.0?
A Hubble Space Telescope
B Spitzer Space Telescope
C Fermi Gamma-Ray Space Telescope
D James Webb Space Telescope
Answers
James Webb Space Telescope holds a promising future in our quest for Earth 2.0
The correct answer is D
How are telescopes utilized?A telescope is indeed a device used to observe distant objects. The planets & stars can be seen through telescopes. Binoculars and cameras both utilize some of the same optical engineering as telescopes.
How does a telescope operate simply?Lenses, which are pieces of curved, glass, were employed in early telescopes to focus light. Curved mirrors are used by the majority of telescopes nowadays to collect light from the night sky. Light is focused by a telescope's mirror or lens' shape. When we gaze through a telescope, that light is what we're seeing.
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Which of the following is NOT an effect of PTH? A) to activate osteoclasts B) increase Ca2+ reabsorption in the kidneys C) promotes activation of vitamin D by the kidneys D) to decrease Ca+ absorption in the gut
Answers
( D) to decrease Ca+ absorption in the gut is NOT an effect of PTH.
what is PTH?It can be referred as the parathyroid glands secrete a peptide hormone known as parathyroid hormone, sometimes known as parathormone or parathyrin, which regulates the serum calcium content via influencing the intestine, kidney, and bone.
What is the PTH function?These processes are induced by the parathyroid hormone: release of calcium into the bloodstream by bones. intestines' ability to absorb calcium from diet. Calcium preservation by the kidneys.
What does a high level of PTH mean?Too much PTH raises calcium levels in the blood, which can result in health issues like kidney stones and bone weakening. Through normal blood tests, doctors typically identify primary hyperparathyroidism early, before major issues arise.
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The digestive, circulatory, respiratory, immune, and excretory systems all work together to maintain homeostasis. Discuss how a minor malfunction in one of these systems could lead to major malfunctions in others. If methods were developed to improve the efficiency and effectiveness of one system, what effect might that improvement have on the other systems?
Answers
All the major systems of the body work together to maintain homeostasis, like, a respiratory disease preventing enough oxygen to reach the body directly affects the circulatory system as heart cannot function efficiently in less oxygen. Methods improving one system will directly improve the other systems as well, like, when the disease is treated, enough oxygen will be available and heart will function properly.
Homeostasis is the condition of maintenance of equilibrium condition inside the living body. Homeostasis is necessary for the body to function correctly and efficiently. Every organ system is involved in maintaining the homeostasis.
Circulatory system of the body is involved in the transport of blood and other nutrients to the whole body. The system comprises of heart, blood vessels, the blood and its components.
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 Which statement about the cells of organisms is accurate?
A. plants are unicellular organisms that have specialized functions.
B. All organisms are multicellular and carry out similar functions of life.
C. The single cell of a unicellular organism carries out all functions of life.
D. The single cell of a unicellular organism can have specialized functions.
Answers
Answer:
B
Explanation:
Animals, plants, and fungi are multicellular organisms so therefore B
If the concentration of glucose was equal inside and outside of the cell, do you think
there would be a net flow of glucose across the cell membrane in one direction or the
other? Explain your answer.
Answers
Answer:
If concentration of glucose were the same inside and outside of a cell then equilibrium is already established so there's no concentration gradient to cause movement of glucose in either direction,thus,in or out
Which two statements correctly describe the relationship between science and technology
Answers
Answer:
The answer is C and D
Explanation:
The two statements that correctly describe the relationship between science and technology are
C. Scientific discoveries can be made as a result of new technology.
D. Scientific discoveries influence the development of new technology.
What are science and technology?Technology and science mutually advance one another. The development of new technologies is based on scientific understanding. Scientists are frequently able to examine nature in novel ways and create novel findings thanks to new tools.
The telescope and microscope are two examples of technology that have advanced science. Technology is the use of knowledge to accomplish practical objectives in a dependable and repeatable way. The result of such an effort is also referred to as technology.
Science, industry, communication, transportation, and daily living all make extensive use of technology.
Therefore, the correct options are C and D.
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Reasons that the population size of an exotic species often grows rapidly when the species is introduced in a new environment include which of the following?
I. The exotic species is resistant to pesticides.
II. There is a large, underutilized food source in the new environment.
III. The exotic species has few natural predators in the new environment.
(A) I only
(B) II only
(C) I and III only
(D) II and III only
(E) I, II, and III
Answers
Reasons that the population size of an exotic species often grows rapidly when the species is introduced in a new environment include II) there is a large, underutilized food source in the new environment, III) the exotic species has few natural predators in the new environment. Hence, option D is correct.
The introduction of an exotic species into a new environment can often cause a rapid population growth due to several key factors.
One of these is that there tends to be a large, underutilized food source in the new environment which the exotic species can take advantage of. Another factor is that the exotic species may have few natural predators in the new environment, allowing them to thrive without fear of predation.
As a result, these two factors can lead to a rapid population growth of an exotic species when it is introduced into a new environment.
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Do you think it is wrong to traffic animals?
Answers
A crocodile-like morphology evolved independently in a group of Triassic reptiles called phytosaurs, and later, after phytosaurs were extinct, in true crocodiles. This is an example of: Sympatric speciation. Iterative evolution Evolutionary drift Genetic drift Lamarckian evolution
Answers
The correct answer is iterative evolution. A crocodile-like morphology evolved independently in a group of Triassic reptiles called phytosaurs, and later, after phytosaurs were extinct, in true crocodiles. This is an example of iterative evolution.
Iterative evolution is the development of similar structures or forms independently over time in separate lineages. This is frequently seen in unrelated lineages of organisms that evolve similar features through convergent evolution. The crocodile-like morphology that evolved independently in Triassic reptiles called phytosaurs and later in true crocodiles is an example of iterative evolution as they evolved independently in separate lineages. The ability of the phytosaurs to thrive in an aquatic environment likely contributed to the development of this morphology, which later allowed true crocodiles to similarly thrive.
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What are the two main categories of fossils
Answers
Answer: they are body fossils and trace fossils
Explanation:
Body fossils show us what a plant or animal looked like. The first type, body fossils, are the fossilised remains of an animal or plant, like bones, shells and leaves.
how might it hurt ecosystem stabiility
Answers
A theme in biology is how structure is related to function. Discuss how the structures of the different chambers and vessels of the heart relate to their functions.
Answers
The right-hand side of the heart is responsible for pumping deoxygenated blood to the lungs. The left-hand side pumps oxygenated blood around the body.
The heart is a large muscular pump and is divided into two halves - the right-hand aspect and the left-hand side. The proper-hand facet of the coronary heart is accountable for pumping deoxygenated blood to the lungs. The left-hand facet pumps oxygenated blood across the frame.
The coronary heart has 4 chambers atria and ventricles. The right atrium receives oxygen-terrible blood from the frame and pumps it to the proper ventricle. The right ventricle pumps the oxygen-terrible blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
Blood vessels are the channels or conduits via which blood is sent to body tissues. The vessels make up two closed structures of tubes that start and cease at the coronary heart. One system, the pulmonary vessels, transports blood from the proper ventricle to the lungs and returned to the left atrium.
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When two amino acids join together, the amine group of one binds to the acid group of another in a unique type of chemical bond. What is the name of this bond?.
Answers
Answer:
pipetide bond
Explanation:
two amino acids are always joined together by a pipetide bond
. A protease is added to a suspension of egg protein in a test-tube and kept at 37°C. After 8 minutes, the protein changes from cloudy to transparent. Which product, or products, will now be present in the test-tube
Answers
Answer:
amino acids
Explanation:
A protease is an enzyme capable of catalyzing the breakdown of proteins into polypeptide fragments and single amino acids, which are the building block of proteins. Proteases act by breaking peptide bonds by a process called hydrolysis, a reaction where water molecules break down peptide bonds (hydro means water and lysis means split). Proteases can be classified depending on the catalytic residue into cysteine, serine, threonine, aspartic, glutamic and metalloproteases.
The product that will be present in the test tube will be amino acids.
Protease is an enzyme that acts on protein by converting it into different
types of amino acids.
Amino acids are referred to as the building block of life and are important
nutrients in growth and replacement of worn-out tissues. The protease acts
on the protein by breaking the peptide bonds under the required
temperature.
An inadequate temperature may result in the denaturing of the enzyme
which was why the test was done at 37°C. This is the body temperature of
humans which led to the formation of amino acids which is absorbed by cells
of the body.
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People with lactose intolerance should still eat dairy products.
a. True
b. False description
Answers
This is true because most people that are diagnosed lactose intolerance still consume dairy products.
what type of organism eats all producers and consumers and all trophic levels?
Answers
Answer:Omnivore
Explanation:
Answer:
omnivores
Explanation:
animals that eat both plants and other animals are called omnivores.
Severe combined immunodeficiency (SCID): Group of answer choices is a result of the absence of macrophages or B cells. affects only part of the adaptive immune response. can be caused by failure of TAP transporters. is caused by the lack of T cell and B cell maturation/differentiation.
Answers
Answer:
is a result of the absence of macrophages or B cells.
Explanation:
Severe combined immunodeficiency (SCID) results due to the absence of macrophages or B cells that is responsible for the immunity of our body. Severe combined immunodeficiency (SCID) is an inherited immunodeficiency disease (PIDD) that presents in infancy results in a weak immune system that is unable to fight against even mild infections so due the absence of macrophages or B cells, the body is vulnerable to diseases.
genetically modified (gm) crops have spread with remarkable speed since their commercial introduction in 1996. from 2007 to 2012, which group of nations saw the greatest increase in gm crops?
Answers
From 2007 to 2012, a group of developing nations saw the largest increase in GM crops. So, the correct option is B.
What are GM crops?GM crops are known as genetically modified crops, defined as plants used in agriculture whose DNA has been modified using genetic engineering methods. In this method, the plant genome can be engineered by physical methods or by the use of Agrobacterium to deliver sequences that are hosted in T-DNA binary vectors.
From 2007 to 2012, a group of developing nations saw the largest increase in GM crops.
So, the correct option is B.
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Your question is incomplete, most probably the complete question is:
Genetically modified (GM) crops have spread with remarkable speed since their commercial introduction in 1996. From 2007 to 2012, which group of nations saw the greatest increase in GM crops?
A) industrialized nations
B) developing nations
C) world total
Which system sends messages through nerves to and from all parts of you body?
A) Muscular system
B) Skeletal system
C) Digestive system
D) Nervous System
Answers
According to the research, the nervous system sends messages through nerves to and from all parts of you body.
What is the nervous system?It is the system that directs, supervises and controls all the functions and activities of the body.
It comprises a set of regulatory organs and specialized cells that are responsible for capturing and processing messages so that the body develops an effective interaction with the environment.
Therefore, we can conclude that according to the research, the nervous system sends messages through nerves to and from all parts of you body.
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studying competition between the peaks of otter salamander and the eastern redback salamander would be an example of studying ecology at the level.
Answers
Studying the competition between the peaks of otter salamander and the eastern redback salamander would be an example of studying ecology at the population level.
Ecology is a scientific discipline that studies living organisms and their interactions with the environment. The different levels of ecology are population ecology, community ecology, ecosystem ecology, and biosphere ecology.
Population ecology is the study of how populations of organisms interact with their environment, including competition between species, predator-prey relationships, and reproductive behavior, among other things.
The peaks of Otter salamander (Plethodon hubrichti) are a group of salamanders found in the Appalachian Mountains in the eastern United States. They are highly adapted to their habitat, which is often moist and cool, and are known for their unique breeding habits.
The eastern redback salamander (Plethodon cinereus) is another species of salamander found in the Appalachian Mountains. It is a common species, and is often found in moist, wooded areas where it feeds on insects and other small invertebrates.
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true or false both the appetite and the satiety center are found in the hypothalamus.
Answers
True. Both the appetite and satiety centers are found in the hypothalamus.
The hypothalamus plays a crucial role in regulating food intake and energy balance. It contains different nuclei that are responsible for controlling hunger and satiety signals. The lateral hypothalamus is associated with the appetite center, which stimulates hunger and initiates food-seeking behaviors. On the other hand, the ventromedial nucleus of the hypothalamus is involved in the satiety center, which promotes feelings of fullness and inhibits further food intake. These centers in the hypothalamus receive and integrate various signals from hormones, neurotransmitters, and other parts of the body to regulate appetite and energy homeostasis.
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Nuclear power is known for producing
large amounts of _?_
pollution.
A. oceanic
B. thermal
C. noise
D. air
Answers
Answer:
B, thermal.
Explanation:
Nuclear power waste a lot of energy through heat.
The diagram shows the heart of a bird.
What is the function of the structure labeled Y?
to keep oxygen-rich blood and oxygen-poor blood flowing
to filter waste materials from oxygen-poor blood
to filter waste materials from oxygen-rich blood
to keep oxygen-rich blood and oxygen-poor blood separate
Answers
Answer:
To keep oxygen-rich blood and oxygen-poor blood seperate
Explanation:
D
Answer:D
Explanation:
yo someone help me out pls
Answers
Answer:
very easy
Explanation:
A - 9
B - 1
C - 4
D - 6
hope this helps you
Juan Pablo has just been brought to the hospital after a car crash from which he suffered blood loss . he is in need of a blood transfusion .after a few tests it is determined that juan pablo has type A+ blood. His wife juanita rushed to the hospital hoping that she could donate blood for her husband. juanita blood gets tested to determine her blood type.
ANTI--A ANTI--B
BOTH HAS CLUMPING
What type of blood does juanita have and can she donate blood for juan Pablo transfusion Answer in the CER format below.
u need can up with a Claim and Evidence, Reasoning
Answers
Claim: Juanita has type A- blood. Therefore, Juanita's blood is compatible with Juan Pablo's blood, and she can donate blood for his transfusion.
Evidence:
The clumping reaction with Anti-A indicates the presence of antigens that are recognized by Anti-A antibodies.The clumping reaction with Anti-B indicates the presence of antigens that are recognized by Anti-B antibodies.Reasoning:
The clumping reactions with both Anti-A and Anti-B antibodies suggest that Juanita's blood contains both A antigens and B antigens. Since there are no clumping reactions with Anti-D, we can infer that Juanita's blood does not have the Rh antigen. Therefore, Juanita's blood type can be determined as A-.
Juanita can donate blood to Juan Pablo if he requires a blood transfusion. Since Juan Pablo has type A+ blood, which contains the A antigen, Juanita's A- blood does not have the Anti-A antibodies that would react negatively with Juan Pablo's blood. Therefore, Juanita's blood is compatible with Juan Pablo's blood, and she can donate blood for his transfusion.
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PLEASE HELP AND GET POINTS!!
Drag each human activity to indicate which fossil fuel has influenced it. (1 point)
coal
natural gas
petroleum/crude oil
:: allowed people to refrigerate and cook food more easily :: increased people's use automobile transportation
:: made more efficient train locomotives :: allowed companies to build more factories
:: allowed people to store and package food and other products
Answers
The fossil fuels are as follows:
Use plastics to store food. - natural gas
Moving products. - Petrol
Supplying water heaters with electricity. - natural gas
Making steel for use in the building. - coal
How fossil fuel has influenced human activity?In sedimentary rock formations, which are collections of rock, dead plant and animal components, and layers of silt, coal is a substance that is frequently present.
Coal must contain more than 50% fossilized plant material, one type of sedimentary rock that holds oil in its natural state is shale.
Therefore, by heating, this substance, thick oil that may be utilized to generate gasoline is produced.
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Answer:
COAL: allowed companies to build more factories, made more efficient locomotives
NATURAL GAS: allowed people to refrigerate and cook food more easily
PETROLEUM/CRUDE OIL: increased people's use of automobile transportation, allowed people to store and package food and other products
Explanation:
Just took the test :)
24. Why is everything in our solar system attracted to the sun? *
a. smallest gravitational attraction in the solar system
b. largest gravitational attraction in the solar system
c. it is equal distance to all the planets
O d. it orbits around the planets
Answers
Answer:
B. Largest gravitational attraction
Explanation:
Newton realized that the reason the planets orbit the Sun is related to why objects fall to Earth when we drop them. The Sun's gravity pulls on the planets, just as Earth's gravity pulls down anything that is not held up by some other force and keeps you and me on the ground.
I beleive it's B because it would have to be a strong gravitational pull to keep everything balanced correctly.
Please mark me brainliest if correct :)
which exotoxin is responsible for interrupting the regulatory mechanisms for muscle contraction, leading to powerful and uncontrolled contraction?
Answers
The exotoxin responsible for powerful and uncontrolled muscle contractions in tetanus is tetanospasmin, produced by Clostridium tetani. It interrupts the regulatory mechanisms for muscle contraction by blocking the release of the inhibitory neurotransmitter GABA.
The exotoxin responsible for interrupting the regulatory mechanisms for muscle contraction, leading to powerful and uncontrolled contractions, is called tetanospasmin. Tetanospasmin is produced by the bacterium Clostridium tetani, which causes the disease tetanus.
Tetanus is characterized by muscle stiffness and spasms, often starting in the jaw and neck and spreading to other parts of the body. The tetanospasmin exotoxin acts by targeting the inhibitory neurons in the central nervous system, specifically the inhibitory interneurons that regulate muscle contraction. It blocks the release of the neurotransmitter gamma-aminobutyric acid (GABA), which normally inhibits muscle activity, leading to unopposed excitation of the muscles.
The result is sustained and intense muscle contractions that can be severe and painful. The muscles remain contracted, leading to the characteristic muscle rigidity seen in tetanus. The interruption of the regulatory mechanisms for muscle contraction by tetanospasmin contributes to the development of tetanic spasms and the associated symptoms of tetanus.
Effective treatment of tetanus includes administration of antitoxin to neutralize the toxin and supportive care to manage muscle spasms and prevent complications. Vaccination with the tetanus toxoid vaccine is an important preventive measure to reduce the risk of tetanus infection.
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