The number of correct statements in the given statements is:
I: | Each seminiferous tubule is lined on its inside by two types of cells called male germ cells and Sertoli cells. |
II: | Sertoli cells synthesise and secrete testicular hormones called androgens. |
III: | Leydig cells provide nutrition to the germ cells. |
IV: | The testis is covered by a dense covering. |
V: | Each testis has about 250 compartments called testicular lobules. |
1. 2
2. 3
3. 4
4. 5
1. | at the morula stage, within 24 – 48 hours of fertilisation |
2. | at the morula stage, about 96 hours post fertilisation |
3. | at the blastocyst stage, 7th – 8th day post fertilization |
4. | at the gastrula stage, about 10 days post fertilization |
What is released at the time of ovulation?
1. Primary oocyte arrested at meiosis I
2. Primary oocyte arrested at meiosis II
3. Secondary oocyte arrested at meiosis I
4. Secondary oocyte arrested at meiosis II
The menstrual bleed is mainly due to the withdrawal of:
1. Oestrogen
2. Progesterone
3. LH
4. FSH
Statement I: | Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct. |
Statement II: | The cavity of the cervix is called cervical canal which along with vagina forms birth canal. |
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. |
A. | Gonadotropin LH stimulates synthesis and secretion of Androgen |
B. | Gonadotropin releasing hormone from hypothalamus |
C. | Androgen stimulates spermatogenesis |
D. | Gonadotropin FSH helps in the process of spermiogenesis |
E. | Gonadotropins from anterior pituitary gland |
1. | (E), (A), (D), (B), (C) | 2. | (C), (A), (D), (E), (B) |
3. | (B), (E), (A), (C), (D) | 4. | (D), (B), (A), (C), (E) |
I: | The primary follicles get surrounded by more layers of granulosa cells, a theca and shows fluid filled cavity antrum. Now it is called secondary follicle. |
II: | Graafian follicle ruptures to release the secondary oocyte from the ovary by the process called ovulation. |