Zoology XII - Human Reproduction 01

Question : 1

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In human, testes are situated outside the abdominal cavity within a pouch called as _______

Options:

	Testicular compartment
	Foreskin
	Scrotum
	Prepuce

Solution :

Testes are present in scrotum

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Question : 2

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In human, total number of testicular lobules present in both testes are nearly about

Options:

	250
	750
	500
	1000

Solution :

Each testis has about 250 compartments called as testicular lobules

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Question : 3

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Each testicular lobule contains one to three highly coiled seminiferous tubules. Which of the following cells are not present inside the seminiferous tubules?

Options:

	Male germ cells
	Sertoli cells
	Sustentacular cells
	Leydig cells

Solution :

Leydig cells/interstitial cells are present outside the seminiferous tubules.

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Question : 4

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Given below is a diagrammatic sectional view of seminiferous tubule

Choose the correct option w.r.t the labelled cells (A to D) related to seminiferous tubules

Options:

	A-Sertoli cell    – Secretes androgens
	C-Spermatozoa – Diploid cell which produce sperm
	B-Sertoli cell      – Secrete androgen binding protein which increase the concentration of androgen inside the tubules
	D-Sperms         – Male gametes produced by spermatogonia

Solution :

A – Leydig cell secrets androgen
B – Sertoli cell provide nutrition to
developing sperm and secrete androgen
binding protein
C – Spermatozoa (haploid cell also
called as sperms)
D – Spermatogonia (diploid cell)
produced sperms

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Question : 5

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Which of the following is an incorrect statement?

Options:

	Each testis is oval in shape, with a length of about 4 to 5 cm and a width of about 2 to 3 cm
	Each testis is covered by a dense covering called as scrotum
	Male germ cells undergo meiotic divisions finally leading to sperm formation
	Sertoli cells provide nutrition to the germ cells

Solution :

Each testis is covered by a dense covering called as tunica albuginea

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Question : 6

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Choose the correct option which includes all the structures present in interstitial space (the regions outside the seminiferous tubules) from the given list

a. Leydig cell

b. Sustantacular cell

c. Interstitial cell

d. Small blood vessels

e. Immunologically competent cell

Options

Options:

	a, d & e only
	c, d & e only
	b, c, d & e only
	a, c, d & e only

Solution :

Sustantacular cells are present inside the seminiferous tubules

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Question : 7

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In human, scrotum helps in maintaining the temperature of testes necessary for spermatogenesis which is _______________ than the body temperature.

Options:

	2-2.5°C lower
	2-2.5°C higher
	Equal
	All of these

Solution :

For spermatogenesis, the required temperature is 2-2.5°C lower than the body temperature.

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Question : 8

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Read the following statements very carefully w.r.t. the function of Sertoli cells

a. Sertoli cell provide nourishment to the developing spermatozoa

b. It also absorbs the parts being shed by developing spermatozoa

c. It releases antimullerian factor to prevent the development of mullerian duct in male and female

d. Release androgen binding protein

e. Release inhibin to check FSH over activity

How many of the above statements are correct?

Options:

	Two
	Three
	Four
	Five

Solution :

Antimullerian factor secreted by Sertoli cells prevent the development of Mullerian duct in male only.

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Question : 9

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Which of the following muscles help in positioning of testes?

Options:

	Dartos muscles
	Cremastor muscles
	Detrusor muscles
	Both (1) & (2)

Solution :

Cremaster and dartos muscle help in positioning of testes

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Question : 10

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Options:

	1
	2
	3
	4

Solution :

a – 7 month
b – Testosterone
c – Cryptorchidism