Q. No.FSH:
1. Acts on Sertoli cells and stimulates secretion of some factors that help in spermiogenesis
2. Acts on Sertoli cells and inhibits secretion of some factors that help in spermiogenesis
3. Acts on Leydig cells and stimulates secretion of some factors that help in spermiogenesis
4. Acts on Leydig cells and inhibits secretion of some factors that help in spermiogenesis
For normal fertility what percent of the sperm in ejaculation must exhibit vigorous motility?
1. 20
2. 30
3. 40
4. 60
The division of primary oocyte results in:
1. unequal cells a smaller haploid secondary oocyte and a larger diploid polar body
2. unequal cells a larger haploid secondary oocyte and a smaller haploid polar body
3. unequal cells a smaller diploid secondary oocyte and a larger haploid polar body
4. equal cells - a haploid secondary oocyte and a haploid polar body
The correct sequence of the various phases of a typical menstrual cycle is:
1. Menstrual → Follicular → secretory → Ovulatory
2. Menstrual → Follicular → Ovulatory → secretory
3. Ovulatory → Follicular → secretory → Menstrual
4. Menstrual → secretory → Follicular → Ovulatory
LH surge:
| 1. | is a dramatic sudden increase in the levels of LH during the early part of menstrual cycle and is responsible for ovulation. |
| 2. | is a dramatic sudden decrease in the levels of LH during the early part of menstrual cycle and is responsible for ovulation. |
| 3. | is a dramatic sudden decrease in the levels of LH during the mid-menstrual cycle and is responsible for ovulation. |
| 4. | is a dramatic sudden increase in the levels of LH during the mid-menstrual cycle and is responsible for ovulation. |
During pregnancy:
1. All events of menstrual cycle stop and there is no menstruation
2. Events of menstrual cycle continue but there is no menstruation
3. Events of menstrual cycle contInue but there is menstruation only in the first trimester
4. All events of menstrual cycle stop and there is menstruation only in the first trimester
In the absence of fertilization, corpus luteum:
| 1. | Stops secreting progesterone but increases the secretion of estrogen |
| 2. | Stops secreting estrogen but increases the secretion of progesterone |
| 3. | Increases the secretion of both progesterone and estrogen |
| 4. | Degenerates |
What ensures that only one sperm can fertilize the ovum?
1. Corona radiata
2. Ground substance around ovum
3. Zona pellucida
4. Acrosome
In humans, the sex of the baby is determined:
1. At the time of fertilization and by the father
2. At the time of fertilization and by the mother
3. At the time of implantation and by the father
4. At the time of implantation and by the mother
During pregnancy the levels of thyroxin:
1. Increase several folds in maternal blood
2. Increases several folds in fetal blood
3. Decreases several folds in maternal blood
4. Decreases several folds in fetal blood
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