1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Butoxors [25]
2 years ago
12

The neuromuscular junction is a well-studied example of a chemical synapse. Which of the following statements describes a critic

al event that occurs at the neuromuscular junction?
a) Acetylcholine is released by axon terminals of the motor neuron.
b) When the action potential reaches the end of the axon terminal, voltage-gated sodium channels open and sodium ions diffuse into the terminal.
c) Acetylcholine binds to its receptor in the junctional folds of the sarcolemma. Its receptor is linked to a G protein.
d) Acetylcholine is released and moves across the synaptic cleft bound to a transport protein.
Biology
1 answer:
WITCHER [35]2 years ago
3 0

Answer:

A- Acetylcholine is released by axon terminals of the motor neuron.

Explanation:

The general mechanism of muscle contraction can be explained as follows:

a) The action potential which is generated, travels along the motor nerve to its ends on muscle fiber (or motor end plate) at the neuro-muscular junction.

b) The nerve endings then secrete small amounts of neurotransmitter called acetylcholine.

c) The actylecholine binds to the receptors on the membrane of muscle fiber and opens the voltage gated sodium channels.

d) Opening of these channels leads to flow of large quantities of sodium ions into the muscle fiber which ultimately results in initiation of action potential in muscle fiber.  

e) This action potential depolarizes the fiber including the T-tubules, triggering the release of calcium ions from sarcoplasmic reticulum.

f) The calcium ions thus released initiated the process of muscle contraction.

You might be interested in
Cynthia is holding a sheet of paper that has a mass of 2 grams. She tears the sheet of paper into many small pieces.which of the
elixir [45]
Either way add all the pieces together you still have 2 grams
7 0
2 years ago
Read 2 more answers
The type of chemical influencing cell division and elongation:
DochEvi [55]
Auxin. 
Auxin<span> is a plant hormone produced in the stem tip that promotes cell elongation. </span>Auxin<span> moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant.

source: </span>https://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookPLANTHORM.html
6 0
3 years ago
What effect have human activities had on the ozone layer?
IgorLugansk [536]

Answer:

Human activities cause the emission of halogen source gases that contain chlorine and bromine atoms. These emissions into the atmosphere ultimately lead to stratospheric ozone depletion.

Explanation:

Hope this helped!

3 0
2 years ago
Read 2 more answers
How do scientist classify kingdoms
Llana [10]

Answer:

The way that scientists classify kingdoms is by their scientific name when they first discovered them so there won’t be no confusion in our world. They can also classify them by what they eat or what environment they live in.

Explanation:

6 0
3 years ago
Read 2 more answers
The acronym that stands for habitat destruction, invasive species, pollution, human population, and overharvesting is
Rama09 [41]
The answer is HIPPO

I hope that helped
5 0
3 years ago
Other questions:
  • What is an allele? a dna sequence different versions of a gene a hairstyle a physical trait?
    5·1 answer
  • A plant is provided adequate carbon dioxide and water, but no light. In this plant
    8·1 answer
  • What is the name of the substance that gives skin and hair its pigment?
    11·1 answer
  • What biome is the aloe best adapted for
    7·2 answers
  • The Apgar Scale is a method used to assess the health of newborns. A score of three would indicate what?
    13·1 answer
  • In the reaction A + B C, doubling the concentration of A doubles the reaction rate and doubling the concentration of B does not
    9·2 answers
  • All essential amino acids
    8·1 answer
  • True or False: Blood pressure is recorded as the diastolic BP over systolic BP.
    14·1 answer
  • BRAINLIST!!!! PLEASE!!! ITS URGENT ITS DUE IN 3 HOURS HELP.
    13·1 answer
  • A person's blood type is determined by?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!