Statement I: | Degeneration of corpus luteum in the absence of fertilization is the cause for disintegration of endometrium. |
Statement II: | Cyclic menstruation indicates normal reproductive phase in human females and extends between menarche and menopause. |
Assertion (A): | During menstrual cycle, the ovulation takes place approximately on 14th day. |
Reason (R): | Rapid secretion of LH in the middle of menstrual cycle induces rupture of Graafian follicle and thereby the release of ovum. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
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 following columns and select the correct option:
Column I | Column II | ||
(a) | Ovary | (i) | Human chorionic gonadotropin |
(b) | Placenta | (ii) | Estrogen & Progesterone |
(c) | Corpus luteum | (iii) | Androgens |
(d) | Leydig cells | (iv) | Progesterone only |
Options: | (a) | (b) | (c) | (d) |
1. | (iv) | (iii) | (ii) | (i) |
2. | (i) | (ii) | (iii) | (iv) |
3. | (i) | (iii) | (ii) | (iv) |
4. | (ii) | (i) | (iv) | (iii) |
No new follicles develop in the luteal phase of the menstrual cycle because :
1. | Follicles do not remain in the ovary after ovulation |
2. | FSH levels are high in the luteal phase |
3. | LH levels are high in the luteal phase |
4. | Both FSH and LH levels are low in the luteal phase |
Which of the following events is not associated with ovulation in human females?
1. Decrease in Oestradiol
2. Full development of Graafian follicle
3. Release of secondary oocyte
4. LH Surge
The main function of mammalian corpus luteum is to produce:
1. Oestrogen only
2. progesterone
3. human chorionic gonadotropin
4. relaxin only
About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occurs?
1. 11th day
2. 14th day
3. 20th day
4. 5th day