Biology - Human Reproduction Question with Solution | TestHub
Match phases of menstruation in column I with events occurring during respective phase in column II and select the correct option.
| Column I | Column II |
|---|---|
| A. Menstrual phase | I. rupturing of mature Graafian follicle |
| B. Follicular phase | II. increase in level of progesterone |
| C. Ovulatory phase | III. decrease in level of estrogen and progesterone |
| D. Luteal phase | IV. development of Graafian follicle |
Options:
Answer:
Solution:
Menstrual phase is triggered by the withdrawal of ovarian hormones, leading to a decrease in the level of estrogen and progesterone. Thus, A matches with III.
Follicular phase involves the development of primary follicles into a fully mature Graafian follicle. Thus, B matches with IV.
Ovulatory phase is characterized by the LH surge which induces the rupturing of the mature Graafian follicle to release the ovum. Thus, C matches with I.
Luteal phase involves the transformation of the ruptured Graafian follicle into the corpus luteum, which secretes large amounts of progesterone. Thus, D matches with II.
The correct matching is A-III, B-IV, C-I, D-II.
Answer: A-III, B-IV, C-I, D-II
