Heart beat decreases in the following conditi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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

Vedclass · Answer

(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 $EXCEPT$ . . . . . . .

Similar Questions

When a normal heart is injected with a physiological concentration of adrenaline,it shows:

If the sympathetic nerve to the heart is cut off,the heart beat will

The heart's normal activities are regulated:

Assertion $(A) :-$ Parasympathetic neural signals decrease the cardiac output.
Reason $(R) :-$ Parasympathetic neural signals decrease the rate of heartbeat and the speed of conduction of action potentials.

When the normal heart of a man is injected with a physiological concentration of adrenaline, it shows:

Vedclass Test Series

Exam Paper Generator

Online Exam Module