Heart beat is accelerated by

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

Question

(D) The heart rate is regulated by the autonomic nervous system and endocrine hormones.$1$. The sympathetic nervous system increases the heart rate by

Vedclass · Accepted Answer

Sympathetic nerves and nor epinephrine

Vedclass · Answer

(D) The heart rate is regulated by the autonomic nervous system and endocrine hormones.$1$. The sympathetic nervous system increases the heart rate by releasing neurotransmitters that stimulate the sinoatrial node.$2$. Adrenaline (epinephrine) and noradrenaline (norepinephrine),secreted by the adrenal medulla,also increase the heart rate and cardiac output during stress or 'fight-or-flight' responses.$3$. Conversely,the parasympathetic nervous system and acetylcholine decrease the heart rate.Therefore,sympathetic nerves and nor epinephrine are responsible for accelerating the heart beat.

Similar Questions

Heart rate is increased by all the following except:

Heart beats are affected by

The pacemaker stimulates:

Heart is innervated by

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

Vedclass Test Series

Exam Paper Generator

Online Exam Module