Mineralocorticoid

Definition

Mineralocorticoids are a class of steroid hormones produced by the adrenal cortex that regulate electrolyte and water balance. The primary mineralocorticoid in humans is aldosterone.

5 Must Know Facts For Your Next Test

1. Mineralocorticoids primarily act on the kidneys to increase sodium reabsorption and potassium excretion.
2. Aldosterone, the chief mineralocorticoid, helps control blood pressure by managing fluid balance.
3. The renin-angiotensin-aldosterone system (RAAS) regulates the secretion of aldosterone.
4. Deficiency or excess of mineralocorticoids can lead to conditions such as Addison's disease or hyperaldosteronism.
5. Mineralocorticoids also play a role in maintaining acid-base homeostasis.

Review Questions

Related terms

Aldosterone:

A steroid hormone that regulates sodium and potassium levels in the blood.

Adrenal Cortex: The outer portion of the adrenal gland responsible for producing steroid hormones including mineralocorticoids.

Renin-Angiotensin-Aldosterone System (RAAS): A hormone system that regulates blood pressure and fluid balance by controlling aldosterone release.