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
blondinia [14]
3 years ago
10

3 Which statement best describes a cause and its effect that occurs during the process of muscle contraction? A. The release of

calcium ions causes myosin and actin to attach to each other. B. The pull of myosin on actin causes the motor neuron to send a nerve impulse. C. The presence of calcium ions within nerve cells causes the sarcomere to shorten. D. The shortening of the sarcomere causes the release of calcium around the myofibrils.
Biology
1 answer:
Y_Kistochka [10]3 years ago
8 0

Answer:A. The release of calcium ions causes myosin and actin to attach to each other.

The contraction of skeletal muscles takes place by induction of a nerve impulse, which produces a movement and the interaction of the filaments containing proteins named as actin and myosin. This interaction of filaments is regulated by proteins  called tropomyosin and troponin present on the actin filaments. The motor nerve causes the depolarization of the muscle membrane sarcolemma. This triggers the sarcoplasmic reticulum to release calcium ions. This calcium binds to troponin and thus allows the tropomyosine strand on the actin filament to displace so that the part of the actin where myosine head needs to be attached remain uncovered. Binding of the actin myosine filament results in contraction.

Hence, the release of calcium ions causes myosin and actin to attach to each other causes muscle contraction.

You might be interested in
Which part of the nervouds system consists of the brain and spinal cord:
Damm [24]

Answer:

c. CNS

Explanation:

The Central Nervous System (CNS) is responsible for receiving and transmitting information throughout the body. We can define it with the command center that coordinates the activities of the body.  It consists of the brain and spinal cord, which are protected by the skull and spine respectively.

Both structures are reinforced by three connective blades, called meninges. They are: dura mater, arachnoid and pia mater. Between the last two there is a fluid that is responsible for the nutrition of the CNS and the minimization of possible trauma caused by mechanical shocks.

7 0
3 years ago
How has selective breeding changed organisms over time?
lisov135 [29]

selective breeding has changed organisms over time by paring that organism up with another organism of its kind with desirable traits. take dogs for example, through selective breeding we now have many different types of dogs with different abilities. i hope this helps

6 0
3 years ago
Read 2 more answers
A star turns matter into energy in the process of
yarga [219]
A star is a fusion reactor. Under enormous pressure, resulting from gravity, light nuclei of gases such as hydrogen merge to form helium, and since this process releases energy, the start begins to radiate the excess energy. Later on, helium fusion produces heavier elements, and so on.
3 0
3 years ago
Read 2 more answers
Why do you think certain laundary detergents contain starch
nirvana33 [79]
Hello user

Question: <span>Why do you think certain laundry detergents contain starch

Answer: Starch is used to clean things some don't contain it because some people believe it is harmful and are allergic to it.

I hope I helped
-Chris</span><span />
3 0
3 years ago
Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as th
aniked [119]

Answer:

Explanation:way

Hey I did a good night morning is the time for the

3 0
3 years ago
Other questions:
  • Why is a 100% fat-free diet unhealthy?
    6·1 answer
  • !!!!!20 POINTS!!!
    12·1 answer
  • A 79-year-old patient is taking a diuretic for treatment of hypertension. this patient is very independent and wants to continue
    9·1 answer
  • Which of these best describes genetic drift
    13·2 answers
  • Cantatas are divided into contrasting sections called movements
    13·1 answer
  • Three students attempt to define what a circle is. Can you match the teacher's comments to the definitions?
    12·1 answer
  • Identify the biotic factors in the environment shown. Check all that apply.
    15·2 answers
  • You are beginning cpr on an adult. you have determined that the victim is unresponsive and is not breathing. what is your next s
    6·1 answer
  • The basic body structure of the fly in the figure above is determined by a cluster of:
    15·1 answer
  • 5.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!