Question

All of the following are functions of adrenaline except

• A. Increases blood supply in skeletal muscle
• B. Hyperglycaemia
• C. Uterine relaxation
• D. Tachycardia

Answer 1

The correct option is C Uterine relaxation

Adrenaline is produced in the medulla of the adrenal gland. The overall effect of adrenaline is to prepare the body for the fight or flight response in times of stress, i.e., for vigorous sudden action.

Key actions of adrenaline include increasing the heart rate, increasing blood pressure, expanding the air passages of the lungs, enlarging the pupil in the eye, redistributing blood to the muscles and altering the body's metabolism, so as to maximise blood glucose levels (primarily for the brain).

Progesterone allows the blastocyst for implanting and develop and protects against the expulsion of the developing pregnancy. Progesterone declines towards the time of delivery, leaving oestrogen to increase the uterine contractility.

So, the correct answer is option C.