NEETZoologyChemical Coordination and Integration
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Neurohypophysis does not synthesise any hormones of its own. Reason (R): Oxytocin and vasopressin are synthesised by the hypothalamus and are transported axonally to the neurohypophysis. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is correct because the neurohypophysis (posterior pituitary) only stores and releases hormones; it does not synthesise any hormones of its own. Reason (R) is also correct and provides the exact explanation for the assertion. The hormones oxytocin and vasopressin, which are released by the neurohypophysis, are actually synthesised by the hypothalamus and are transported axonally to the neurohypophysis for storage and subsequent release. Answer: Both (A) and (R) are correct and (R) is the correct explan