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WAEC Biology 1988 Question 19

Question 19

Hormonal Coordination

Which of the following statements is correct of hormones? Hormones are

  1. A.secreted into blood through ducts
  2. B.secreted directly into the blood stream
  3. C.inactive chemical substances in the blood stream
  4. D.non-specific in their mode of action
  5. E.secreted at the site of the target organs
Show the answer and explanation

Answer: B (secreted directly into the blood stream)

Explanation

Endocrine glands are ductless, so hormones pass directly into the blood, which carries them to their target organs.