Decreasing the concentration of sodium ions in the blood will result ina)increased ADH secretion and increased aldosterone secretionb)Increased ADH secretion and decreased aldosterone secretionc)Decreased ADH secretion and increased aldosterone secretiond)Decreased ADH secretion and decreased aldosterone secretion.Correct answer is option 'C'. Can you explain this answer?

Question

Answer

Explanation:
The concentration of sodium ions in the blood is tightly regulated by the body. If the concentration of sodium ions in the blood decreases, the body responds by increasing the secretion of aldosterone and decreasing the secretion of ADH. This helps to retain more sodium ions in the body and increase their concentration.

Decreased ADH secretion:
ADH, also known as vasopressin, is a hormone produced by the hypothalamus and released by the pituitary gland. Its main function is to regulate the amount of water in the body. When the concentration of sodium ions in the blood decreases, the body responds by decreasing the secretion of ADH. This helps to reduce the amount of water excreted by the kidneys, which in turn helps to increase the concentration of sodium ions in the blood.

Increased aldosterone secretion:
Aldosterone is a hormone produced by the adrenal glands. Its main function is to regulate the concentration of sodium ions and potassium ions in the body. When the concentration of sodium ions in the blood decreases, the body responds by increasing the secretion of aldosterone. This helps to retain more sodium ions in the body and increase their concentration.

Conclusion:
Therefore, decreasing the concentration of sodium ions in the blood will result in decreased ADH secretion and increased aldosterone secretion. This helps to retain more sodium ions in the body and increase their concentration, which is important for many physiological functions.

Answer

Sodium ions

are necessary for regulation of

blood

and body fluids, transmission of nerve impulses, heart activity, and certain metabolic

functions. It's decrease in blood cause a condition called hyponatremia associated with decrease in adh secretion and increase in aldosterone secretion.

Answer

Sodium depletion, by reducing plasma volume and renal perfusion, stimulates the production of renin (from the kidneys) which generates angiotensin in circulation. This hormone is a vasoconstrictor (so protects blood pressure), stimulates thirst (so helps to restore ECF volume) and, above all, stimulates sodium retention both directly (renally) and indirectly (by stimulating adrenal secretion of aldosterone); it thus reduces the sodium concentration of urine, feces, saliva, and sweat, but not milk.
Indices of aldosterone secretion (reduced sodium or potassium concentration in urine, feces, etc.) are often taken as evidence of sodium depletion or inadequate sodium intake

Answer

Correct answer is.c. Decreased ADH secretion and increased aldosterone secretion

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