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Solution


Q.

Fight-or-flight reactions cause activation of                  [2014]
1 the parathyroid glands, leading to increased metabolic rate  
2 the kidney, leading to suppression of renin-angiotensin-aldosterone pathway  
3 the adrenal medulla, leading to increased secretion of epinephrine and norepinephrine  
4 the pancreas leading to a reduction in the blood sugar levels  

Ans.

(3)

Hormones epinephrine and norepinephrine are secreted from adrenal medulla. They are emergency hormones released in condition of stress, emergency, etc. Epinephrine and norepinephrine are also released by adrenergic nerve fibres of sympathetic nervous system where they act as neurotransmitters.