MCAT Question A Day - 8/30/14

Irreversible sequestering of calcium in the sarcoplasmic reticulum would most likely:

A. result in permanent contraction of the muscle fibers, similar to what is seen in rigor mortis.

B. create a sharp increase in bone density as calcium is resorbed from bones to replace the sequestered calcium.

C. prevent myosin from binding to actin.

D. depolymerize actin filaments in the sarcomere.

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