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

Choose the correct answer from the options given below:

To determine the correct statements regarding the functions of adrenal medullary hormones, let us analyze each statement individually:

Adrenal medullary hormones primarily include epinephrine (adrenaline) and norepinephrine (noradrenaline). These hormones are released during stress or emergency situations and stimulate the "fight-or-flight" response, which is mediated by the sympathetic nervous system.

Analysis of the Statements:
A. It causes pupillary constriction:
During a fight-or-flight response, the body needs to let in more light to improve vision and assess threats. Therefore, adrenal medullary hormones cause pupillary dilation (mydriasis), not constriction (miosis). Thus, statement A is incorrect.
B. It is a hyperglycemic hormone:
To deal with stress, the body requires a rapid supply of energy. Adrenal medullary hormones promote glycogenolysis (breakdown of glycogen into glucose) in the liver and skeletal muscles, as well as lipolysis. This raises the blood glucose level, making it a hyperglycemic action. Thus, statement B is correct.
C. It causes piloerection:
Stimulation by these hormones causes the contraction of arrector pili muscles attached to hair follicles, leading to goosebumps or hair standing on end (piloerection). Thus, statement C is correct.
D. It increases strength of heart contraction:
These hormones act on the cardiovascular system to increase heart rate, cardiac output, and the strength/force of myocardial contraction to ensure adequate blood flow to vital organs. Thus, statement D is correct.

Comparing these findings with the options, statements B, C, and D are correct. Therefore, the correct option is B, C and D Only.