The Heart Has to Be Able to Regulate Its Contractions

question 63

Multiple Choice

The heart has to be able to regulate its contractions. Heart muscle, unlike skeletal muscle, cannot go into a tetanus. This is because

• A) the heart muscle has to be able to consistently contract and pump blood in a controlled fashion.
• B) heart muscle is not resistant to fatigue.
• C) heart muscle contracts faster than skeletal muscle.
• D) heart muscle cannot use glycogen.
• E) the heart uses aerobic metabolism.

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