The spermatids are transformed into spermatozoa by the process called:

1. Spermiation

2. Spermatocytogenesis

3. Spermiogenesis

4. Spermatolysis

What causes the onset the puberty in males?

1. Increase in secretion of testosterone by testis

2. Decrease in secretion of testosterone by testis

3. Increase in secretion of GnRH by hypothalamus

4. Decrease in secretion of GnRH by hypothalamus

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

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:

What ensures that only one sperm can fertilize the ovum?

1. Corona radiata

2. Ground substance around ovum

3. Zona pellucida

4. Acrosome

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

The first movements of the fetus and the appearance of hair on the head are usually observed during:

1. 2^nd month

2. 3^rd month

3. 5^th month

4. 6^th month