Question

Choose the correct statement about neurohypophysis
A) It stores and release hormones secreted by hypothalamus
B) It is poorly developed and functionless in human
C) It stores the hormones produced by adenohypophysis
D) It secretes its own hormones

Answer 1

Hint: Neurohypophysis is the posterior lobe of the pituitary gland. It is also called posterior pituitary gland and is a part of the endocrine system.

Complete answer:
Posterior pituitary gland is not a gland unlike the anterior pituitary gland. Thus, it is not a true endocrine gland. Let us analyze the options to find out the correct options.

Option A: posterior pituitary or neurohypophysis is the posterior lobe of pituitary gland. It is connected to the hypothalamus and stores the secretion of hypothalamus. Oxytocin and vasopressin are the hormones that are produced by hypothalamus and stored in the neurohypophysis.Therefore, this is the correct option.

Option B: Neurohypophysis forms the major part of the endocrine system as it is the part of the pituitary gland which is the main organ of the endocrine system. It is specialised to store the hormones secreted by hypothalamus. It is not poorly developed. Therefore, this is the incorrect option.

Option C: Adenohypophysis is called the anterior pituitary lobe. They store and release their own hormones and their hormones are not stored in neurohypophysis.Therefore, this is the incorrect option.

Option D: Neurohypophysis is not an endocrine gland and does not secrete its own hormones. It is only a storage organ which stores the hormones released by the hypothalamus.Therefore, this is the incorrect option.

Thus, the correct answer is option (A) It stores and releases hormones secreted by hypothalamus.

Note: The posterior pituitary consists of neuronal projections containing magnocellular neurosecretory cells which extends from the hypothalamus. The various hormones secreted by thyroid are,
i) TSH or Thyroid Stimulating Hormone
ii) LH or Luteinising Hormone
iii) HGH or Human Growth Hormone
iv) ACTH or Adrenocorticotropic Hormone
v) Oxytocin