Question

A decrease in blood pressure volume will not cause the release of-

• A. Renin
• B. Atrial natriuretic factor
• C. Aldosterone
• D. ADH

Answer 1

The correct option is B

Atrial natriuretic factor

The correct option is B.

Explanation of correct option:

1. Atrial natriuretic factor (ANF) is a peptide hormone secreted by the atrial walls of the heart.
2. It is mainly secreted in response to high blood pressure.
3. This hormone acts as a vasodilator and decreases blood pressure.
4. It also reduces the water and sodium concentration in the circulatory system.

Explanation of incorrect option:

Option A:

1. Renin is an enzyme released by the juxtaglomerular cells of the kidney.
2. It is released when the kidney receives a low volume of blood.

Option C:

1. Aldosterone is a steroid hormone secreted by the adrenal cortex.
2. It increases the reabsorption of salt and water, thereby maintaining water and electrolytes balance in the body.

Option D:

1. Antidiuretic hormone (ADH) is released by the posterior pituitary gland.
2. When the body is dehydrated, ADH secretion is facilitated. It stimulates nephrons to reabsorb more water,

Final answer:

A decrease in blood pressure volume will not cause the release of atrial natriuretic factor.