MCAT Question A Day - 1/9/14 | FreeMCATPrep.com

MCAT Question A Day - 1/9/14

Before depolarization of a muscle cell, where will calcium ions primarily be found?

A. In extracellular fluid just outside the sarcolemma.

B. In the axon endings of a motor neuron.

C. In the intracellular fluid just inside the sarcolemma.

D. In the sarcoplasmic reticulum.

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