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NEET 2016 Phase 2 · BiologyPrevious Year Question

The posterior pituitary gland is not a 'true' endocrine gland because

Answer: (B) It only stores and releases hormones. Answer: (b) It only stores and releases hormones Solution: The posterior pituitary (neurohypophysis/pars nervosa) does not synthesise its own hormones.

  1. A.It is provided with a duct
  2. B.It only stores and releases hormones✓
  3. C.It is under the regulation of hypothalamus
  4. D.It secretes enzymes

Correct Answer

(B) It only stores and releases hormones

Solution & Explanation

Answer: (b) It only stores and releases hormones Solution: The posterior pituitary (neurohypophysis/pars nervosa) does not synthesise its own hormones. Oxytocin and vasopressin are actually synthesised by the hypothalamus and merely transported axonally to, and stored/released from, the posterior pituitary. Since a true endocrine gland synthesises the hormones it secretes, the posterior pituitary is not a 'true' endocrine gland. NCERT Reference: Chapter 19, Page 241, Line(s) 24-28 — "Neurohypophysis (pars nervosa) also known as posterior pituitary, stores and releases two hormones called oxytocin and vasopressin, which are actually synthesised by the hypothalamus and are transported axonally to neurohypophysis."

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