In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was:
1. | High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo |
2. | High level of circulating HCG to stimulate endometrial thickening |
3. | High levels of FSH and LH in uterus to stimulate endometrial thickening |
4. | High level of circulating HCG to stimulate oestrogen and progesterone synthesis |
Which one of the following statements is false in respect of viability of mammalian sperm?
1. | Sperm is viable for only up to 24 hours |
2. | Survival of sperm depends on the pH of the medium and is more active in alkaline medium |
3. | Viability of sperm is determined by its motility |
4. | Sperms must be concentrated in a thick suspension |
1. | In spermiogenesis, spermatids are formed, while in spermiation, spermatozoa are formed. |
2. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatids are formed. |
3. | In spermiogenesis, spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, while in spermiation, spermatozoa are formed. |
4. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatozoa are released from Sertoli cells into the cavity of seminiferous tubules. |
1. A-2 B-4 C-3 D-1
2. A-3 B-4 C-1 D-2
3. A-3 B-1 C-4 D-2
4. A-1 B-4 C-3 D-2
Which of the following layers in an antral follicle is acellular?
1. Granulosa
2. Theca interna
3. Stroma
4. Zona pellucida
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 |
1. | LH and FSH trigger 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 |
1. | storage of nutrients for the offspring. |
2. | union of an egg and a sperm. |
3. | process by which a gamete is formed. |
4. | division of cells during development. |