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Which of the following statements given ...

Which of the following statements given below are true with reference to muscle contraction.
I. Neurotransmitter acetycholine is released as nerve impulse reaches the end of axon and binds to receptor sites of motor end plate.
II. Action potential passes from motor end plate over sarcoplasmic and then into the T-tubules and sarcoplasmic reticulum.
III. Calcium ion are released into the sarcoplasm bind to troponin, causing a change in its shape and position.
IV. Myosin cross bridges are able to bind to exposed active sites of actin.
Choose the correct option.

A

I, II and III

B

II and IV

C

I and IV

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
d
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