Question

The endocrine nature of kidney is indicated by secretion of ..............

• A. calcitriol
• B. aldosterone
• C. glucagon
• D. vasopressin

Hint:

Calcitriol is the active form of vitamin D, secreted by the kidneys, and plays a critical role in calcium regulation.

Answer 1

The Correct Option is A

Step 1: Understanding the endocrine function of kidneys.
Kidneys are involved in hormone production, including the secretion of calcitriol, which is important for calcium homeostasis. Calcitriol is the active form of vitamin D.
Step 2: Analyzing the options.
(A) calcitriol: Correct. The kidneys secrete calcitriol, which is essential for regulating calcium levels.
(B) aldosterone: Incorrect. Aldosterone is secreted by the adrenal glands, not the kidneys.
(C) glucagon: Incorrect. Glucagon is produced by the pancreas, not the kidneys.
(D) vasopressin: Incorrect. Vasopressin (antidiuretic hormone) is produced by the pituitary gland, not the kidneys.
Step 3: Conclusion.
The correct answer is (A) calcitriol, as it is the hormone secreted by the kidneys that demonstrates their endocrine function.