Question:
Match List-I with List-II
List-I List-II (A) Granulosa cells (I) Activates LH surge (B) Inhibin (II) Lutein cells (C) Estradiol (III) Regulation of estrus in seasonal breeders (D) Pineal gland (IV) Antral follicles
Match List-I with List-II
| List-I | List-II |
|---|---|
| (A) Granulosa cells | (I) Activates LH surge |
| (B) Inhibin | (II) Lutein cells |
| (C) Estradiol | (III) Regulation of estrus in seasonal breeders |
| (D) Pineal gland | (IV) Antral follicles |
Show Hint
- Inhibin is produced by granulosa cells of antral follicles to suppress FSH.
- Estradiol triggers the LH surge (positive feedback) once it reaches peak levels.
- Melatonin from the pineal gland translates day length into reproductive signals for seasonal breeders.
- Estradiol triggers the LH surge (positive feedback) once it reaches peak levels.
- Melatonin from the pineal gland translates day length into reproductive signals for seasonal breeders.
Updated On: Jul 23, 2026
- (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
- (A) - (II), (B) - (IV), (C) - (III), (D) - (I)
- (A) - (IV), (B) - (I), (C) - (III), (D) - (II)
- (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Reproductive cyclicity, follicular development, and seasonal breeding patterns are regulated by endocrine feedback loops involving ovarian cells, pituitary hormones, and pineal gland secretions.
Step 2: Detailed Explanation:
Let us match the anatomical structures and hormones in List-I with their physiological roles in List-II:
- (A) Granulosa cells:
Following ovulation and under the influence of LH, the granulosa cells of the ruptured follicle undergo hypertrophy and biochemically differentiate (luteinize) into large lutein cells (granulosa lutein cells) of the corpus luteum, which secrete progesterone.
Thus, (A) matches with (II).
- (B) Inhibin:
Inhibin is a glycoprotein hormone synthesized and secreted by the granulosa cells of growing antral follicles.
Its primary function is to exert negative feedback on the anterior pituitary to selectively suppress FSH secretion.
Thus, (B) matches with (IV).
- (C) Estradiol:
Estradiol, secreted by mature dominant follicles, reaches a critical threshold in the blood during late proestrus/estrus.
This high concentration exerts positive feedback on the hypothalamus, triggering a large release of GnRH which activates the preovulatory LH surge.
Thus, (C) matches with (I).
- (D) Pineal gland:
The pineal gland secretes melatonin in response to darkness.
Melatonin serves as the chemical signal that regulates the hypothalamic-pituitary-gonadal axis, coordinating the regulation of estrus in seasonal breeders (such as sheep, goats, and horses) based on photoperiod.
Thus, (D) matches with (III).
Combining these matches, we get: (A)-(II), (B)-(IV), (C)-(I), (D)-(III).
Step 3: Final Answer:
The correct option is (A).
Reproductive cyclicity, follicular development, and seasonal breeding patterns are regulated by endocrine feedback loops involving ovarian cells, pituitary hormones, and pineal gland secretions.
Step 2: Detailed Explanation:
Let us match the anatomical structures and hormones in List-I with their physiological roles in List-II:
- (A) Granulosa cells:
Following ovulation and under the influence of LH, the granulosa cells of the ruptured follicle undergo hypertrophy and biochemically differentiate (luteinize) into large lutein cells (granulosa lutein cells) of the corpus luteum, which secrete progesterone.
Thus, (A) matches with (II).
- (B) Inhibin:
Inhibin is a glycoprotein hormone synthesized and secreted by the granulosa cells of growing antral follicles.
Its primary function is to exert negative feedback on the anterior pituitary to selectively suppress FSH secretion.
Thus, (B) matches with (IV).
- (C) Estradiol:
Estradiol, secreted by mature dominant follicles, reaches a critical threshold in the blood during late proestrus/estrus.
This high concentration exerts positive feedback on the hypothalamus, triggering a large release of GnRH which activates the preovulatory LH surge.
Thus, (C) matches with (I).
- (D) Pineal gland:
The pineal gland secretes melatonin in response to darkness.
Melatonin serves as the chemical signal that regulates the hypothalamic-pituitary-gonadal axis, coordinating the regulation of estrus in seasonal breeders (such as sheep, goats, and horses) based on photoperiod.
Thus, (D) matches with (III).
Combining these matches, we get: (A)-(II), (B)-(IV), (C)-(I), (D)-(III).
Step 3: Final Answer:
The correct option is (A).
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