The secondary sexual characters develop in females because of:

(1) estrogen

(2) androgens

(3) absence of androgens

(4) absence of estrogens

Subtopic:  Male Reproductive System |
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The cleavage divisions in humans is:

1. holoblastic, equal and indeterminate

2. holoblastic, unequal and indeterminate

3. holoblastic, equal and determinate

4. holoblastic, unequal and determinate

Subtopic:  Implantation : Part 2 | Implantation |
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The testes are situated outside the abdominal cavity within a pouch called scrotum. This is necessary as:

1. The scrotum can contain lengthy ducts for the transfer of sperms

2. Scrotum helps in maintaining the low temperature of the testes necessary for spermatogenesis

3. Scrotum reduces the pressure around testes necessary for spermatogenesis

4. Scrotum can store huge amounts of sperms

Subtopic:  Male Reproductive System |
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Each seminiferous tubule is lined on its inside by:

1. Spermatogonia

2. Primary spermatocytes

3. Sertoli cells

4. Both 1 and 3

Subtopic:  Seminiferous Tubules & Spermatogenesis |
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Leydig cells:

1. Are present in seminiferous tubules and secrete androgens

2. Are present in seminiferous tubules and help in maturation of sperms

3. Are present in interstitial space and secrete androgens

4. Are present in interstitial space and help in maturation of sperms

Subtopic:  Seminiferous Tubules & Spermatogenesis |
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Seminal plasma is rich in:

1. Sucrose, calcium and certain enzyme

2. Glucose, sodium and certain enzymes

3. Fructose, calcium and certain enzymes

4. Fructose, sodium and certain enzymes

Subtopic:  Semen and Male Fertility |
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The spermatids are transformed into spermatozoa by the process called:

1. Spermiation

2. Spermatocytogenesis

3. Spermiogenesis

4. Spermatolysis

Subtopic:  Spermiogenesis/Sperm Structure/Hormonal Regulation |
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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

Subtopic:  Seminiferous Tubules & Spermatogenesis |
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For normal fertility what percent of the sperm in ejaculate must exhibit vigorous motility ?

(1) 20

(2) 30

(3) 40

(4) 60

Subtopic:  Semen and Male Fertility |
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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

Subtopic:  Ovary |
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