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Anatomy Quiz 1 Spring10

Anatomy Quiz 1 Spring10 - 2 Once the ventricular pressure...

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Biology 302 Quiz #1 Spring 2010 1. The force of cardiac muscle contraction is influenced primarily by A. number of calcium ions entering the cells through slow channels* B. rate at which sodium ions diffuse into the cells C.the number of calcium ions that can be stored in the sarcoplasmic reticulum D.duration of the absolute refractory period E. up and down regulation of the beta adrenergic receptors on the cells
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Unformatted text preview: 2. Once the ventricular pressure rises above that of the arterial pressure -------A. the AV valve closes* B. the heart is in its relaxation period C. the ventricles begin to fill D.All of the above E. Only A and C 3. Murmur resulting from the stenosis of the tricuspid valve will be heard between ---A.S2 and S1 B. S1 and S2 C.During ventricular filling D. Both A and C* E. Both B and C...
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