Which event does NOT occur during the relaxation period? A) calcium is pumped by Ca²⁺-ATPase B) myosin-binding sites are covered by tropomyosin C) actin filaments extend back to their resting position D) calcium levels are rising in the sarcoplasm

Question

Quizplus · Accepted Answer

During the relaxation period, calcium is pumped out of the sarcoplasm by the Ca2+-ATPase pump (Choice A), myosin-binding sites are covered by tropomyosin (Choice B), and actin filaments return to their resting position (Choice C). Therefore, the event that does NOT occur during the relaxation period is the rising of calcium levels in the sarcoplasm (Choice D).

Which Event Does NOT Occur During the Relaxation Period