A. | In non-primate mammals, cyclical changes during reproduction are called oestrus cycle. |
B. | First menstrual cycle begins at puberty and is called menopause. |
C. | Lack of menstruation may be indicative of pregnancy. |
D. | Cyclic menstruation extends between menarche and menopause. |
1. | A, C and D only | 2. | A and D only |
3. | A and B only | 4. | A, B and C only |
Assertion (A): | Endometrium is necessary for implantation of blastocyst. |
Reason (R): | In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium. |
1. | (A) is False but (R) is True. |
2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
4. | (A) is True but (R) is False. |
Match the items given in Column I with those in Column II and select the correct option given below:
Column I | Column II | ||
(a) | Proliferative Phase | (i) | Breakdown of the endometrial lining |
(b) | Secretory Phase | (ii) | Follicular Phase |
(c) | Menstruation | (iii) | Luteal Phase |
Options: | (a) | (b) | (c) |
1. | (iii) | (ii) | (i) |
2. | (i) | (iii) | (ii) |
3. | (ii) | (iii) | (i) |
4. | (iii) | (i) | (ii) |
1. | LH and FSH triggers ovulation in ovary |
2. | LH and FSH decrease gradually during the follicular phase |
3. | LH triggers the secretion of androgens from the Leydig cells. |
4. | FSH stimulates the sertoli cells which help in spermiogenesis |
Which part of the ovary in mammals acts as an endocrine gland after ovulation?
1. | Graafian follicle |
2. | Stroma |
3. | Germinal epithelium |
4. | Vitelline membrane |
Ovulation in the human female normally takes place during which phase of the menstrual cycle:
1. Just before the end of the secretory cycle.
2. At the beginning of the proliferative phase.
3. At the end of the proliferative phase.
4. At the mid-secretory phase.
After ovulation, follicles convert into:
1. Corpus luteum
2. Corpus albicans
3. Corpus cavernosa
4. Corpus callosum