passwella.
Menu

WAEC Biology 2013 Question 20

Question 20

Excretion

Which of the following conditions would result in a decrease in the production of antidiuretic hormone?

  1. A.Abnormally high blood sugar level.
  2. B.Drinking large quantities of water.
  3. C.Increase in osmotic pressure of blood.
  4. D.Period of strenuous exercise.
Show the answer and explanation

Answer: B (Drinking large quantities of water.)

Explanation

ADH makes the kidney keep water. After drinking a lot of water the blood is dilute, so ADH output falls and a large volume of dilute urine is passed.