During relaxation of skeletal muscle fibers,a/an __________ system pumps calcium back into the sarcoplasmic reticulum for storage.
A)simple diffusion
B)chemiosmotic
C)active transport
D)facilitated diffusion
E)pinocytic

Question

Quizplus · Accepted Answer

During relaxation, the calcium ions that were released from the sarcoplasmic reticulum need to be removed from the sarcoplasm in order for the muscle fiber to relax. This is achieved through an active transport system that pumps the calcium back into the sarcoplasmic reticulum for storage until the next contraction. Simple diffusion, chemiosmotic, facilitated diffusion, and pinocytic mechanisms are not actively regulated and therefore not suitable for this process.

During Relaxation of Skeletal Muscle Fibers,a/an __________ System Pumps Calcium