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
stellarik [79]
3 years ago
7

You experimentally apply a toxin to a muscle and find that it does not contract when you electrically stimulate the motor neuron

leading to it. You know that this toxin blocks acetylcholine receptors. Therefore, you suspect that the stimulation of contraction is failing because: Group of answer choices
Biology
1 answer:
Furkat [3]3 years ago
5 0

The question provided is not complete as it lacks the group of choices, however the group of choices are given as follows:

A. A contraction fails to occur because an action potential is not generated in the muscle cell.

B. A contraction fails to occur because this toxin directly prevents ion release from intracellular stores.

C. A contraction fails to occur because neurotransmitter release by the motor neuron is blocked at the neuromuscular junction.

D. A contraction fails to occur because this toxin prevents cross bridge formation and thereby directly prevents contraction.

E. C and D are both true

Answer:

The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.

Explanation:

A muscle contraction takes place when action potential bring to muscles by nerves, which is traveled with the help of motor neuron and imitated the muscle contraction.

Acetylcholine or Ach is a chemical messenger to bring the nerve impulses between a nerve and a muscle. If the receptor is block with applying toxin muscle will not contract as ACh will not be able to propagate the nerve impulse to the muscle so there will be no action potential.

The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.

You might be interested in
The ears, feet and tail of north american mammals are often smaller in northern species than they are in southern species. Expla
alukav5142 [94]
This phenomenon can be explained by Allen's rule. It says that the body proportions and shape may vary in different climates. The temperature decreases as the latitude increases, so in the northern region is much colder. Animals must preserve heat in such conditions. So, exposed surface areas of the body, such as the ears, feet, and tail, are usually minimized to minimize heat loss in the cold climate. <span>Therefore, northern species often have smaller ears, feet, and tail than the southern species. </span>
3 0
3 years ago
What does a red blood cell look like at in 0.65M solution
Ket [755]
It depends on what kind of solution is referred as 0.65 M. If the solution where the red blood cell is present is hypertonic, the red blood cell will shrink. If the solution is hypotonic, the red blood cell will expand. If the solution is isotonic, the red blood cell will not expand or shrink.  
6 0
3 years ago
What is the primary role of decomposers in an ecosystem A.
KonstantinChe [14]
The answer is D. I hope it helps

8 0
2 years ago
Read 2 more answers
Give two reasons why humans need a balanced ecosystem <br>​
satela [25.4K]

Answer:

us humans need a balanced ecosystem because its what keeps us alive. when having a balanced ecosystem we have cleaned water, purified air, maintained soil, regulates our climate, recycles nutrients, and provides us with food.

6 0
3 years ago
Read 2 more answers
How can introduced species lead to economic losses
Mazyrski [523]
<span>no predator, Thus enabling it to  it to grow and kick the other organism out of the area</span>
<span />
5 0
3 years ago
Other questions:
  • Which two countries are the basis for the language and customs of Latin America?
    13·2 answers
  • How many times stronger the signal for the carbon than the signal for nitrogen?
    5·1 answer
  • . Limb bones within unrelated animals that have the same basic structures are considered
    7·1 answer
  • In a Punnett square, parent traits are written as a letter which represent what?
    14·1 answer
  • Do we live in the troposphere?
    9·2 answers
  • How does light affect plant growth? explain plz with cer
    14·2 answers
  • What is the difference between an every day question and a<br> scientific question?
    7·1 answer
  • What is the mRNA sequence for the template strand DNA sequence?3' TACAAACTAGAA 5' *
    7·1 answer
  • In the 2nd cycle what beings to appear
    7·1 answer
  • Please help!!
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!