Question

multiple choice question
what is the role of creatine phosphate during skeletal muscle contraction?
o it is used to pump calcium ions into the sarcoplasm in order to sustain contraction for a longer time.
o it is used to release myosin heads when atp is low.
o it is used to quickly regenerate atp from adp.
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Explanation:

Creatine phosphate has high - energy bonds. During skeletal muscle contraction, when ATP is quickly used up, creatine phosphate donates its phosphate group to ADP to rapidly regenerate ATP. It is not involved in pumping calcium ions into the sarcoplasm for long - term contraction or releasing myosin heads when ATP is low.

Answer:

It is used to quickly regenerate ATP from ADP.