A male can be infertile if:
1. | the sperm count is less than 20 million per ml of semen |
2. | only 75% of the sperms are morphologically normal |
3. | only 75 % of the sperm exhibit vigorous motility |
4. | the Bulbourethral gland secretion is reduced to 75% |
A hormone secreted by the placenta and used in pregnancy to develop fetal metabolism and general growth and development is:
1. | Thyroxin | 2. | Cortisol |
3. | hPL | 4. | hCG |
The most accurate sequence of hormones secreted during a typical menstrual cycle will be:
1. | FSH, LH, estrogen, progesterone |
2. | LH, FSH, estrogen, progesterone |
3. | FSH, estrogen, LH, progesterone |
4. | FSH, estrogen, progesterone, LH |
During embryonic development, which of the following structures actually differentiates into the embryo?
1. | Morula | 2. | Blastocyst |
3. | Inner cells mass | 4. | Trophoblast cells |
At what stage of the follicular development does the primary oocyte complete its first meiotic division?
1. | Primary follicle | 2. | Secondary follicle |
3. | Tertiary follicle | 4. | Graafian follicle |
Identify the correct statement:
1. | Sertoli cells help in spermiation |
2. | The sperms are stored in seminal vesicles in humans |
3. | Corpus Albicans secretes large amounts of progesterone |
4. | For normal fertility, at least 40% sperms must show vigorous motility |
The number of eggs released by the mother if she gave birth to identical twins or fraternal twins would respectively be:
1. | 1 and 1 | 2. | 1 and 2 |
3. | 2 and 1 | 4. | 2 and 2 |
The level of which of the following hormones is increased several folds in the maternal blood when compared with a non-pregnant stage?
1. | hCG | 2. | hPL |
3. | Relaxin | 4. | Thyroxine |
During embryonic development:
1. | the trophoblast cells help in the formation of the placenta and inner cell mass differentiates into the embryo |
2. | the trophoblast cells differentiate into the embryo and inner cell mass helps in the formation of the placenta |
3. | the trophoblast cells help in the formation of the placenta and both trophoblast cells and inner cell mass differentiate into the embryo |
4. | the trophoblast cells help in the formation of the placenta and differentiate into the embryo as well |
The primary oocyte divides to produce:
1. | A large diploid secondary oocyte and a small haploid first polar body |
2. | A large haploid secondary oocyte and a small haploid first polar body |
3. | A large diploid secondary oocyte and a small haploid second polar body |
4. | A large haploid secondary oocyte and a small haploid secondary polar body |