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What is the next step in muscle contraction after the actin changes shape?
A. An ATP molecule binds to the myosin.
B. Myosin and actin slide past each other.
C. A calcium ion binds to actin.
D. Myosin binds to actin.

Respuesta :

moonsmile

Answer:

D. Myosin binds to actin.

Explanation:

arshikhan8123

The correct option is D.

What are the steps of muscle contraction in order?

The process of muscular contraction occurs over a number of key steps, including:

  1. Depolarisation and calcium ion release.
  2. Actin and myosin cross-bridge formation.
  3. The sliding mechanism of actin and myosin filaments.
  4. Sarcomere shortening (muscle contraction)

What is the next step in muscle contraction after calcium ions bind to actin?

If present, calcium ions bind to troponin, causing conformational changes in troponin that allow tropomyosin to move away from the myosin-binding sites on actin. Once the tropomyosin is removed, a cross-bridge can form between actin and myosin, triggering contraction.

Learn more about muscle contraction here https://brainly.com/question/14974206

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