Which of the following is not a role of ionic calcium in muscle contraction?
A) triggers neurotransmitter secretion
B) binds with troponin
C) removes contraction inhibitor
D) activates epinephrine released from adrenal gland

Question

Quizplus · Accepted Answer

Ionic calcium does not activate epinephrine released from the adrenal gland. Epinephrine is a hormone that is released from the adrenal gland in response to various stressors and activates the sympathetic nervous system. Calcium ions play a crucial role in muscle contraction by binding with troponin, which triggers a conformational change in the protein complex that allows myosin to interact with actin and initiate muscle contraction. Calcium ions also remove the contraction inhibitor tropomyosin from the actin binding sites and trigger the release of neurotransmitters at the neuromuscular junction.

Which of the Following Is Not a Role of Ionic