Question

The hormone ANP is produced by
A. Adrenal glands
B. Capillary walls
C. Kidneys
D. Atria

Answer 1

Hint: ANP is the stands for an Atrial Natriuretic Peptide. It is released by the atrium of the heart when there is an increase in blood pressure due to elevated blood volume, which causes stretching of the atrium.

Complete answer:
The hormone is a type of peptide hormone carried in the blood to the kidney.
1. ANF activates guanylate cyclase in the collecting duct of the kidney which causes an increase in the cGMP levels which triggers increased renal excretion of sodium and water, thus balancing the electrolyte levels in the body which ultimately reduces blood volume.
2. The receptors for this hormone are widely placed throughout the body.
3. It also interacts with other hormones to regulate their production.
4. In the CNS ANP plays the role of a neurotransmitter to regulate pituitary and vegetative functions.
5. Plasma ANP levels are damaged in several endocrine diseases, the plasma levels are elevated in hypercortisolism, hyperaldosteronism, thyrotoxicosis, and inappropriate antidiuretic secretion.

The correct option is ( D ).

Note: In Addison’s disease, it is used to keep in account the quality of mineralocorticoid elements in retrospect to their other biological criteria.