Question: 160. Consider the following statements regarding function of adrenal medullary hormones:
A. It causes pupilary constriction
B. It is a hyperglycemic hormone
C. It causes piloerection
D. It increases/strength of heart contraction
(1) C and D Only
(2) B, C and D Only
(3) A, C and D Only
(4) D Only
Answer: Option (2)
Explanation:
Adrenal medullary hormones (adrenaline and noradrenaline) prepare the body for “fight or flight”. They do not cause pupilary constriction; instead, they cause dilation, so Statement A is incorrect.
These hormones increase blood glucose levels by stimulating glycogenolysis and lipolysis. Hence, Statement B (hyperglycemic effect) is correct.
They cause piloerection (goosebumps) due to stimulation of smooth muscles associated with hair follicles. Thus, Statement C is correct.
They increase heart rate and the force of contraction by stimulating cardiac muscle. Therefore, Statement D is correct.
Correct statements are B, C, and D. Hence, the correct option is (2).