Question

Fight-or-flight reaction causes activation of:

• A. the parathyroid glands, leading to increased metabolic rate.
• B. the kidney, leading to suppression of renin angiotensin-aldosterone pathway.
• C. the adrenal medulla, leading to increased secretion of epinephrine and norepinephrine
• D. the pancreas leading to a reduction in the blood sugar levels

Answer 1

The correct option is C the adrenal medulla, leading to increased secretion of epinephrine and norepinephrine

Adrenaline (epinephrine) and noradrenaline (norepinephrine) is secreted by the adrenal medulla of the adrenal gland.
These hormones are commonly called as 'emergency hormone' or 3F-hormone (For fear, fight and flight).
Its secretion is regulated by the sympathetic nervous system and not by pituitary gland, as in the case of adrenal cortex.
Secretion of these hormones increases the alertness, pupillary dilation, piloerection (raising of hairs), sweating, the heartbeat and the strength of heart contraction and the rate of respiration.