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WAEC Biology 2013 Objective — Question 20

Question 20 of 60 from the West African Examinations Council (WAEC) Biology 2013 Objective paper, with the correct answer and a full explanation.

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

  • A. Abnormally high blood sugar level
  • B. Drinking large quantities of waterCorrect
  • C. Increase in osmotic pressure of blood
  • D. period of strenuous exercise

Explanation

Drinking large quantities of water results in a decrease in anti-diuretic hormone (ADH) secretion, i.e. more water, less ADH — the higher the ADH secretion, the higher the blood pressure.

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