Question

A student simulates muscle contraction in a model using the following order of events: Calcium pumps of the sarcoplasmic reticulum open. Tropomyosin moves. Calcium ions bind to troponin. Myosin heads bend to attach to actin filaments. Based on the order of steps in the student's model, will the muscle successfully contract?

Answer 1

yes the muscles should contract 

Answer 2

Answer:

The correct answer will be- No muscle will not contract

Explanation:

Calcium plays an important role in the contraction of the muscle which causes movement.

The calcium is released from the sarcoplasmic reticulum when neurotransmitter enters the muscle. The released calcium binds the troponin molecule which controls the movement of the tropomyosin.

The tropomyosin covers the site for binding actin and myosin. The binding of troponin to calcium changes the conformation of the tropomyosin which allows the formation of the cross-bridge between actin and myosin.

In the given question, since the sequence of the options is not correct therefore the muscle will not contract.

Thus, No muscle will not contract is the correct answer.