Fundamentholfundamenthol
NEET2025Biology
Q.

Consider the following statements regarding function of adrenal medullary hormones :

(A) It causes pupilary constriction.

(B) It is a hyperglycemic hormone.

(C) It causes piloerection.

(D) It increases strength of heart contraction.

Choose the correct answer from the options given below :

  1. A

    D only

  2. B

    C and D only

  3. C

    B, C and D only

  4. D

    A, C and D only

Solution

The adrenal medulla secretes adrenaline (epinephrine) and noradrenaline — the “emergency” hormones. Their typical sympathetic effects:

  • (A) Incorrect — they cause pupillary dilation, not constriction.
  • (B) Correct — they stimulate glycogenolysis, raising blood glucose (hyperglycemia).
  • (C) Correct — they cause piloerection (raising of body hair).
  • (D) Correct — they increase the strength and rate of heart contraction.

B, C and D are correct.

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