Which of the following is involved in muscle relaxation?
A) Acetylcholinesterase destroys acetylcholine to allow the muscle membrane to return to resting potential.
B) Ca2+ is actively taken up by the lateral sacs of the sarcoplasmic reticulum when there is no longer a local action potential.
C) The cross bridges pull the filaments back to their original resting positions.
D) Acetylcholinesterase destroys acetylcholine to allow the muscle membrane to return to resting potential, and Ca2+ is actively taken up by the lateral sacs of the sarcoplasmic reticulum when there is no longer a local action potential.
E) All of these.
Correct Answer:
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