Which portion of nephron is under the control of ADH?
Correct answer: C. Distal and collecting ducts
- A. Bowman's capsule
- B. Ascending arm
- C. Distal and collecting ducts
- D. Descending arm
Explanation
Option C is correct.ADH (antidiuretic hormone), also known as vasopressin, regulates water balance in the body by controlling the permeability of water in the distal tubules and collecting ducts of the nephron in the kidney. When the body needs to conserve water, ADH is released from the pituitary gland and acts on the cells in the distal tubules and collecting ducts to increase their permeability to water, allowing more water to be reabsorbed from the urine back into the bloodstream. This results in the production of more concentrated urine and helps conserve water in the body.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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