In the given diagram, identify parts marked as A-D

A-Hypothalamus
B-Anterior pituitary
C-Leydig cells
D-Testis

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A-Hypothalamus
B-Posterior pituitary
C-Sertoli cells
D-Testis

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A-Hypothalamus
B-Anterior pituitary
C-Sertoli cells
D-Testis

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A-Hypothalamus
B-Posterior pituitary
C-Interstitial cells
D-Testis

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Solution

The correct option is A
A-Hypothalamus
B-Anterior pituitary
C-Leydig cells
D-Testis

Spermatogenesis initiates due to increase in the secretion of gonadotropin releasing hormone (GnRH) from hypothalamus. The increased levels of GnRH then acts at the anterior pituitary gland and stimulates secretion of LH and FSH. LH acts on leydig cells and stimulates synthesis and secretion of Androgens. Testosterone (Androgen) further stimulates the process of spermatogenesis. FSH acts on sertoli cells stimulates secretion of some factors which help in the process of spermiogenesis. Sertoli cells also secrete inhibin hormone which suppress FSH synthesis.

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Similar questions

List hormones secreted by the following:
(a) Hypothalamus
(b) Pituitary
(c) Thyroid
(d) Parathyroid
(e) Adrenal
(f) Pancreas
(g) Testis
(h) Ovary
(i) Thymus
(j) Atrium
(k) Kidney

Q. Match column I with column II and select the correct option from the given.

Column I	Column II
A. Hypothalamus	(i) Relaxin
B. Anterior pituitary	(ii) Progesterone
C. Testis	(iii) FSH and LH
D. Ovary	(iv) Androgen
	(v) Gonadotropin releasing hormone

Q. GnRH from hypothalamus reaches anterior pituitary through.

Q. The hypothalamus controls the anterior pituitary by means of

Q. Assertion: Anterior lobe of pituitary is attached to hypothalamus by a vein
Reason: This attachment is done through a portal vein

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