matiejohnson1111 matiejohnson1111

25-07-2024
Health

Answered

Which of the following has an excitatory effect on heart rate?

1. Histamine
2. Hypothyroidism
3. Low basal metabolic rate (BMR)
4. Sympathetic nervous system
5. PTU

Answer :

GinnyAnswer GinnyAnswer

25-07-2024

Final answer:

The sympathetic nervous system stimulates the heart rate through the release of epinephrine and norepinephrine.

Explanation:

Sympathetic nervous system has an excitatory effect on the heart rate. When the sympathetic system is activated, it releases epinephrine and norepinephrine, which stimulate the heart to beat faster by binding to both alpha and beta receptors on the cardiac muscle cell membrane.

Learn more about Effects on heart rate here:

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