The substrate used for sperm metabolism is produced by the

  • prostate

  • seminal vesicle

  • Cowper's gland

  • testes

The male sex accessory ducts do not include-

  • Rete testis

  • Vasa efferentia

  • Epididymis

  • Ureter

Which of the following cell will undergo meiosis?

  • Sertoli cells

  • Spermatogonia

  • Leydig cell

  • Immunologically competent cells

Epididymis is located in….of testis.

  • Anterior surface

  • Posterior surface

  • Lateral surface

  • Anterolateral surface

Eyelashes in foetus are formed

  • By the end of 12 weeks

  • By the end of 20 weeks

  • By the end of 24 weeks

  • By the end of 30 weeks

Separation of eye-lids of foetus is observed in

  • Ending of 24 weeks

  • In second trimester

  • Both A and B

  • At the ending of second trimester

The structure of testis of a mammal can be identified by the presence of

  • Spermatogonia

  • Spermatocytes

  • Cells of Sertoli

  • Spermatids

In the vertebrates testes, for nourishment during spermiogenesis, the spermatids get attached to

  • Interstitial cells

  • Sperm-mother cells

  • Spermatocytes

  • Sertoli cells

In man the vas deferencs emerges from

  • Cauda epididymis

  • Caput epididymis

  • Corpora cavernosa

  • Glomus major

Follicular atresia is

  • Formation of corpus luteum

  • Degeneration of folliciles 

  • Formation of Graffian follicle

  • Increase in number of follicles

The menstrual cycle begins with the casting off of

  • Placenta

  • Blood

  • Endometrial lining along with blood vessels

  • All the three

Graafian follicle of ovary secretes which hormone

  • Cortisone

  • Relaxin

  • Progesterone

  • None of these

Human milk differs from cow's milk in that it contains a

  • Higher percentage of fat

  • Higher percentage of carbohydrate

  • Lower percentage of protein

  • (2) and (3)

The secondary sexual characters develop in females because of:

  • estrogen

  • androgens

  • absence of androgens

  • absence of estrogens

The cleavage divisions in humans is:

  • holoblastic, equal and indeterminate

  • holoblastic, unequal and indeterminate

  • holoblastic, equal and determinate

  • holoblastic, unequal and determinate

The testes are situated outside the abdominal cavity within a pouch called scrotum. This is necessary as:

  • The scrotum can contain lengthy ducts for the transfer of sperms

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

  • Scrotum reduces the pressure around testes necessary for spermatogenesis

  • Scrotum can store huge amounts of sperms

Each seminiferous tubule is lined on its inside by:

  • Spermatogonia

  • Primary spermatocytes

  • Sertoli cells

  • Both 1 and 3

Leydig cells:

  • Are present in seminiferous tubules and secrete androgens

  • Are present in seminiferous tubules and help in maturation of sperms

  • Are present in interstitial space and secrete androgens

  • Are present in interstitial space and help in maturation of sperms

Seminal plasma is rich in:

  • Sucrose, calcium and certain enzyme

  • Glucose, sodium and certain enzymes

  • Fructose, calcium and certain enzymes

  • Fructose, sodium and certain enzymes

The spermatids are transformed into spermatozoa by the process called:

  • Spermiation

  • Spermatocytogenesis

  • Spermiogenesis

  • Spermatolysis

What causes the onset the puberty in males?

  • Increase in secretion of testosterone by testis

  •  Decrease in secretion of testosterone by testis

  • Increase in secretion of GnRH by hypothalamus

  • Decrease in secretion of GnRH by hypothalamus

For normal fertility what percent of the sperm in ejaculate must exhibit vigorous motility ?

  • 20

  • 30

  • 40

  • 60

The division of primary oocyte results in:

  • unequal cells a smaller haploid secondary oocyte and a larger diploid polar body

  • unequal cells a larger haploid secondary oocyte and a smaller haploid polar body

  • unequal cells a smaller diploid secondary oocyte and a larger haploid polar body

  • equal cells - a haploid secondary oocyte and a haploid polar body

The correct sequence of the various phases of a typical menstrual cycle is:

  • Menstrual →           Follicular →           secretory →           Ovulatory

  •  Menstrual →           Follicular →           Ovulatory →           secretory

  • Ovulatory →           Follicular →           secretory →           Menstrual

  •  Menstrual →           secretory →           Follicular →           Ovulatory

During pregnancy:

  • All events of menstrual cycle stop and there is no menstruation

  • Events of menstrual cycle continue but there is no menstruation

  • Events of menstrual cycle contInue but there is menstruation only in the first trimester

  • All events of menstrual cycle stop and there is menstruation only in the first trimester

In the absence of fertilization, corpus luteum:

  • Stops secreting progesterone but increases the secretion of estrogen

  • Stops secreting estrogen but increases the secretion of progesterone

  • Increases the secretion of both progesterone and estrogen

  • Degenerates

What ensures that only one sperm can fertilize the ovum?

  • Corona radiata

  • Ground substance around ovum

  • Zona pellucida

  • Acrosome

During pregnancy the levels of thyroxin:

  • Increase several folds in maternal blood

  • Increases several folds in fetal blood

  • Decreases several folds in maternal blood

  • Decreases several folds in fetal blood

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

  • 2nd month

  • 3rd month

  • 5th month

  • 6th month

The milk produced during the initial few days of lactation, called colostrum, is essential for the new born as colostrums contains:

  • Large amount of glucose

  • Anti-infective antibodies

  • Fats

  • Various hormones

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