Question

Assertion :Oxytocin is also Known as Anti-Diuretic hormone (ADH). Reason: Oxytocin can cause an increase in the renal reabsorption of water.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is D Both Assertion and Reason are incorrect

It is not oxytocin, but the hormone vasopressin (also known as antidiuretic hormone, ADH) because it reduces the volume of urine by increasing the reabsorption of water from the urine in the distal convoluted tubules, collecting tubules and collecting ducts in the kidney. It does so by rendering the walls of those tubules permeable to water. Failure of secretion of vasopressin leads to reduced renal reabsorption of water and consequent elimination of a large volume of very dilute (hypotonic) urine. Oxytocin is another hormone released by the posterior lobe of pituitary gland Oxytocin contracts the mammary glands, smooth muscles of the uterus. Uterine contractions, stimulated by oxytocin at the end of pregnancy, help in the childbirth or parturition, hence also called birth hormone.

So the correct answer is 'Both Assertion and Reason are incorrect'.