20 Aug 2014
August 20, 2014

Question of the day – August 20

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The correct response to Tuesday’s question is b. synchondrosis.

Today’s sample question is from the Part I subject of Physiology.

Which of these is the major source of calcium ions in the excitation-contraction coupling of cardiac muscle?

    1. Purkinje fibers
    2. sarcoplasmic reticulum
    3. mitochondria
    4. intercalated disc

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