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The coordinated action of two types of myofilaments, actin and myosin, results in muscle contraction. The muscles contract as actin filaments slide over myosin filaments. When the muscle is in a relaxed state, the myosin heads are ready to bind with the actin filament. However, they are not able to bind due to

a.
the absence of ATP

b.
a high concentration of Ca++ ions

c.
blockage of the attachment site

d.
alcoholic fermentation

Sagot :

Answer:

I think due to absence of ATP but I'm not sure.. Actin and myosin return to their unbound state causing the muscle to relax. Alternatively relaxation (failure) will also occur when ATP is no longer available.

Myosin heads are ready to bind with the actin filament they are not able to bind due to the absence of ATP.

How two myofilaments involved in muscle contraction?

Muscle contraction results from an intercommunication between the actin and myosin filaments which generate movement relative to one another.

What happens to the actin and myosin filaments when a muscle contracts?

Myosin movement appear to be a kind of molecular hop. The myosin reaches forward, binds to actin, contracts, releases actin, and then reaches forward again to bind actin in a new cycle.

What happens to actin and myosin during muscle relaxation?

Relaxation occurs when nerve stimulation stops. Calcium gets moved back into the sarcoplasmic reticulum shattering the link between actin and myosin. Actin and myosin then return to their unbound state causing the muscle to relax.

To learn more about actin and myosin, here

https://brainly.com/question/14130153

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