If you cut all the nerves to the heart but kept the heart alive, a. the heart would stop beating. b. the heart would continue beating. c. only systole would occur. d. only diastole would occur.
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This system is composed of specialized cells called pacemaker cells, which are located in the sinoatrial (SA) node and the atrioventricular (AV) node. These cells generate electrical impulses that cause the heart to contract and pump blood. The nerves that Show more…
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Which of the following occurs in the cardiac cycle if the impulse triggered at the sinoatrial node never close? Diastole will shorten in duration The ventricles will not contract There will be an absence of systole The atria will not contract.
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