Discuss about the functions of aldosterone and atrial natriureteric peptide.

Functions of aldosterone:

1.      Aldosterone in essential for life. Total loss of adrenocortical secretion usually causes within 3 days to 2 weeks.

2.      Aldosterone increase renal tubular reabsobtion of Na⁺

3.      Aldosterone increase renal tubular secretion of K⁺

4.      Aldosterone increase extracellular fluid volume and arterial pressure.

5.      Aldosterone increase tubular secretion of H⁺

6.      Aldosterone stimulate Na⁺ & K⁺ transport in sweat glands, salivary glands and intestinal epithelial cells.

Function of ANP:

            As a result of volume expansion, atrial muscle stretched and release ANP, which has effect on kidney. It increase GFR thus increase renal excretion of Na⁺ & water.