Question

A person suffers from excessive thirst and excessive urination.This condition may be the result of

• A. A reduction in insulin secretion from pancreas.
• B. A reduction in vasopressin secretion from posterior pituitary.
• C. A fall in the glucose concentration in urine.
• D. An increase in secretion of glucagons.

Answer 1

The correct option is B

A reduction in vasopressin secretion from posterior pituitary.

Vasopressin, also called antidiuretic hormone, plays a key role in maintaining osmolality or the concentration of dissolved particles, such as salts and glucose, in the serum and therefore in maintaining the volume of water in the extracellular fluid (the fluid space that surrounds cells). A deficiency of this hormone results in icreased thirst and urination.