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Physiology

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Central Nervous System

Question
16 out of 18
 

In animals with chronic exposure to cold what is true (AIIMS MAY 2011)



A Sympathetic tone to heart is not much affected

B Free insulin is increased

C Vagal inhibition of heart is reduced

D Perfusion of adipose tissue is decreased

Ans. C Vagal inhibition of heart is reduced
  1. Several studies indicate that chronic exposure to cold activate some adaptive mechanisms characterized by a diminution of the sympathetic response and a concomitant enhancement of the vagal activation. As a result the heart rate decreases.
  2. The various other studies and their results suggest that cold depresses blood insulin levels through activation of the α-adrenergic inhibition of the pancreatic insulin response.
  3. There is a increased blood flow to adipose tissue to increase thermogenesis in adipose tissue (primarily in

Central Nervous System Flashcard List

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