Question

The hormone secreted by the posterior lobe of pituitary is concerned with:

• A. stimulation of parathyroid
• B. secondary sexual characters
• C. protein metabolism
• D. contraction of uterine muscles

Answer 1

The correct option is D contraction of uterine muscles

Two hormones are classically considered as being related to posterior pituitary :

1) Oxytocin - acts on the smooth muscles of our body and stimulates their contraction. In females, it stimulates a vigorous contraction of the uterus at the time of childbirth and milk ejection from the mammary gland.

2) Vasopressin - acts mainly at the kidney and stimulates resorption if water and electrolytes by distal tubules and thereby reduce the loss of water through urine (diuresis).

So the correct answer is contraction of uterine muscles.