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WAEC Agricultural Science 1992 Question 50

Question 50

Animal Anatomy and Physiology

Which of the following will not help milk let-down in a lactating dairy cow?

  1. A.Injection of oxytocin
  2. B.Presence of calf
  3. C.Provision of feed
  4. D.Injection of progesterone
  5. E.Presence of a milker.
Show the answer and explanation

Answer: D (Injection of progesterone)

Explanation

Oxytocin causes milk let-down; progesterone is a pregnancy hormone with no such effect.