Question

A hormone secreted by the posterior lobe of pituitary is concerned with

• A. Contraction of uterine muscles
• B. Secondary sexual characters
• C. Stimulation of thyroids
• D. Metabolism of carbohydrates

Answer 1

The correct option is A Contraction of uterine muscles

Oxytocin is a hormone that acts on organs in the body and as a chemical messenger in the brain, controlling key aspects of the reproductive system, including childbirth and lactation, and aspects of human behaviour. Oxytocin is produced in the hypothalamus and is secreted into the bloodstream by the posterior pituitary gland. The posterior pituitary does not produce any hormones of its own, rather, it stores and secretes two hormones made in the hypothalamus— oxytocin and antidiuretic hormone. Oxytocin stimulates the uterine muscles to contract and also increases production of prostaglandins, which increase the contractions further

So, the correct answer is 'contraction of uterine muscles'