Match List-I with List-II.
| List-I | List-II |
| A. Hypothalamic hormone | i. Enzymes |
| B. Acrosome | ii. hCG |
| C. Placenta | iii. Androgens |
| D. Leydig's cells | iv. GnRH |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A-iv, B-i, C-ii, D-iii
(A) Hypothalamic hormone — this matches (iv) GnRH. Gonadotropin releasing hormone is made by the hypothalamus. Its rise at puberty acts on the anterior pituitary, which then releases LH and FSH and starts spermatogenesis.
(B) Acrosome — this matches (i) Enzymes. The acrosome is the cap over the front of the sperm nucleus. It is filled with enzymes that help the sperm fertilise the ovum.
(C) Placenta — this matches (ii) hCG. Besides joining the embryo to the mother, the placenta works as an endocrine tissue and makes human chorionic gonadotropin (hCG), hPL, estrogens and progestogens.
(D) Leydig's cells — this matches (iii) Androgens. These interstitial cells lie outside the seminiferous tubules and synthesise and secrete androgens, the testicular hormones, under the action of LH.
NCERT Extract:
Gametogenesis – “… Spermatogenesis starts at the age of puberty due to significant increase in the secretion of gonadotropin releasing hormone (GnRH). This, if you recall, is a hypothalamic hormone. … LH acts at the Leydig cells and stimulates synthesis and secretion of androgens. … The sperm head contains an elongated haploid nucleus, the anterior portion of which is covered by a cap-like structure, acrosome. The acrosome is filled with enzymes that help fertilisation of the ovum.”
Pregnancy and Embryonic Development – “… Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc.”