Question

multiple choice question
muscle cells use atp for:
o the release of calcium from the sarcoplasmic reticulum
o relaxation only
o relaxation and contraction
o contraction only

Explanation:

ATP is used in muscle cells for both relaxation and contraction processes. During contraction, it provides energy for myosin - actin interactions. For relaxation, it helps in pumping calcium back into the sarcoplasmic reticulum.

Answer:

O relaxation and contraction