PHYSIOLOGY
BLOOD PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Low levels of which Ion may cause a decrease in heart rate?
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Ca2+
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K+
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Na+
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Ca-
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Explanation:
Detailed explanation-1: -Normal plasma calcium concentration was 2.71 ± 0.20 mm (N = 25). Heart rate was increased by calcium in the range from 1.6 to 14.0 mm and fell at still higher levels.
Detailed explanation-2: -Much of the Ca needed for contraction comes from the sarcoplasmic reticulum and is released by the process of calcium-induced calcium release.
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