Answer
b. Aldosterone is not directly inhibited by the action of epinephrine
Work Step by Step
Aldosterone is a mineralocorticoid that is produced by the zona glomerulosa of the adrenal cortex. its release is regulated by renin which is secreted by the kidneys. Aldosterone increases the absorption of sodium and the excretion of potassium by the kidneys.
When blood levels of sodium fall and and blood pressure decreases the kidneys (JGA) are stimulated to secrete renin. Renin in the blood converts the plasma angiotensinogen to Angiotensin I . The capillaries of the lungs produce angiotensin converting enzyme (ACE) which converts Angiotensin I to Angiotensin II. Aldosterone is secreted by the adrenal cortex under the stimulation of Angiotensin II.
While epinephrine has no direct effect on the activity of aldosterone , the catecholamines do affect plasma potassium levels-- hypokalemia is known to negatively affect plasma aldosterone levels.
