Heart beat decreases in the following conditi | vedclass

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(D) The heart rate is regulated by various physiological and chemical factors.$1$. Acidosis (low $pH$) and alkalosis (high $pH$) can disrupt cardiac f

Vedclass · Accepted Answer

increase in level of hormone epinephrine

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(D) The heart rate is regulated by various physiological and chemical factors.$1$. Acidosis (low $pH$) and alkalosis (high $pH$) can disrupt cardiac function and generally decrease heart rate.$2$. Hypoxia (low oxygen levels) initially may cause tachycardia but prolonged hypoxia leads to a decrease in heart rate.$3$. Elevated levels of $K^{+}$ (hyperkalemia) decrease the resting membrane potential,leading to a decrease in heart rate,while high $Na^{+}$ levels can also interfere with cardiac conduction.$4$. Epinephrine (adrenaline) is a hormone that stimulates the sympathetic nervous system,which increases both the heart rate and the force of contraction. Therefore,an increase in epinephrine levels causes an increase,not a decrease,in heart rate.

Heart beat decreases in the following conditions $EXCEPT$ . . . . . . .

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