Question

Which hormone among these is not secreted by an endocrine gland?

• A. ADH
• B. ANF
• C. T4
• D. PTH

Answer 1

The correct option is B

ANF

The correct option is B.

Explanation of correct option:

1. The atrial walls of the heart secrete ANF or atrial natriuretic factor.
2. The blood pressure drops as a result of it. ANF, which is released when blood pressure rises, widens the blood vessels and lowers blood pressure.
3. The hypothalamus, pituitary, pineal, thyroid, parathyroid, thymus, pancreas, adrenal gland, and gonads are examples of animal endocrine glands.

Explanation of incorrect options:

Option A:

1. ADH is a hormone that is created in the hypothalamus, a region of the brain.
2. The pituitary gland, located near the base of the brain, then releases it.
3. The pituitary gland is an example of the endocrine gland.

Option C:

1. T4, tetraiodothyronine, is produced by the thyroid gland.
2. The thyroid gland is an endocrine gland.

Option D:

1. The parathyroid glands release a hormone called parathyroid hormone (PTH) that regulates the amount of calcium in the body.
2. It also regulates the amounts of vitamin D and phosphorus.

Final answer: ANF is not secreted by the endocrine gland.