Q. I. Increased alertness II. Pupillary dilation III. Raising of hairs IV. Sweating All of the above written physiological processes are regulated by

A) Adrenaline
B) Norepinephrine
C) Both (a) and (b)
D) Thymosin
Explanation

Adrenal medulla releases two hormones adrenaline and noradrenaline. In the stress conditions, these hormones increase alertness, pupillary dilution, piloerection (raising of hairs), sweating etc. Both of these hormones increase the heart beat. Catecholamines (adrenaline and noradrenaline) also stimulate the breakdown of glycogen resulting in an increased concentration of glucose in blood. In addition they also stimulate the breakdown of lipids and proteins

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.