Chemical Coordination And Regulation Ques 47
47. Feeling the tremors of an earthquake a scared resident of seventh floor of a multistored building starts climbing down the stairs rapidly. Which hormone initiated this action?
[2007]
(a) adrenaline
(b) glucagon
(c) gastrin
(d) thyroxine
Show Answer
Answer : a
Hints & Solutions
(a) It is commonly called as ’emergency hormone’ or $3 F$ - hormone (For fear, fight & flight). Its secretion is regulated by SNS, and not by pituitary as in case of adrenal cortex. It stimulates sweating, heart beat and breathing rate. It causes the dilation of coronary artery (supplying blood to the heart muscles), bronchioles (for increasing inspiratory volume) and pupil (for better vision).
BETA
