Human Reproduction Test

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Human Reproduction Test - 68

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Weekly Quiz Competition

Question 1
1 / -0

In human females, menstrual cycle ceases around $$50$$ years of age. It is termed as

A
Menopause

B
Menarche

C
Diapause

D
None of the above

Solution

In human females endometrium (the innermost layer of the uterus) undergoes cyclical changes every month which is known as menstruation. It starts at the age of puberty, this beginning is called menarche. Human females can only reproduce till 45 to 50 years of age. When the menstruation stops it is called menopause.
So, the correct option is 'menopause'.
Question 2
1 / -0

Which layer of uterus undergoes cyclic changes during menstrual cycle?

A
Myometrium

B
Endometrium

C
Perimetrium

D
All the above

Solution

Menstrual cycle starts with the menstrual flow i.e. shredding of endometrial lining, ovum and some blood vessels. This is followed by follicular phase. During this phase secretion of gonadotropins (LH and FSH) and estrogens. In the middle of the cycle, rapid secretions of LH and FSH increases leading to LH surge and hence ovulation. Ovum lasts for 24 hours only. It is followed by the luteal phase during which the remaining parts of Graafian follicle changes into corpus luteum.
So, the correct option is 'endometrium'.
Question 3
1 / -0

Which is false about viability of mammalian sperm?

A
Sperm is viable for only 24 hours.

B
Sperm viability is determined by its motility.

C
Sperms must be concentrated in thick suspension.

D
It depends upon pH of medium as sperm is more active in alkaline medium/

Solution

Sperms are ejaculate with pre-ejaculates as a thick suspension and they are more active in alkaline medium. After ejaculation, sperm can live inside the female body for around 5 days. Once inside the female reproductive tract, the sperm cells swim through the cervix and into the uterus to reach the fallopian tubes and female egg.
So, the correct option is 'Sperm is viable for only 24 hours'.
Question 4
1 / -0

In mammals, Sertoli cells occur in

A
Germinal epithelium of testis

B
Germinal epithelium of ovary

C
Medulla of kidney

D
Adrenal cortex

Solution

Sertoli cells are present at germinal epithelium which is the wall of highly coiled seminiferous tubules along with male germ cells of testes in males and provide nutrition to the sperm formed by male germ cells.
So the correct option is 'Germinal epithelium of testis'.
Question 5
1 / -0

In mammals, spermatogenesis is stimulated by

A
MSH

B
TSH

C
ADH

D
FSH

Solution

Spermatogenesis is the process of sperm formation in male mammals and is stimulated by FSH as it controls both the production of androgen-binding protein (ABP) by Sertoli cells and the formation of the blood-testis barrier.
So the correct option is 'FSH'.
Question 6
1 / -0

Spermatogenesis changes.

A
Spermatogonium into primary spermatocyte

B
Primary spermatocyte into secondary spermatocyte

C
Secondary spermatocyte into spermatid

D
All the above

Solution

In seminal vesicle, undifferentiated germ cells called spermatogonia grow in size by accumulating cytoplasm and replicating DNA, termed as primary spermatocyte.
Primary spermatocytes undergoes first meiotic division and produce secondary spermatocytes.
The secondary spermatocytes soon undergo second meiotic division and produce spermatids.
So, the correct answer is 'All the above'
Question 7
1 / -0

Number of autosomes in human primary spermatocyte is

A
$$22$$

B
$$23$$

C
$$44$$

D
$$46$$

Solution

Some of the spermatogonia (primary spermatocytes) located in seminiferous tubule undergo mitosis. Each primary spermatocyte divides to give rise to two short-lived secondary spermatocytes, which in turn give rise to two spermatids. primary spermatocytes are diploid whereas secondary are haploid.
so, the correct option is '44'.
Question 8
1 / -0

Which is not a function of Sertoli cells?

A
Nurse cells to sperms

B
Secreting hormone inhibin

C
Forming a manchette

D
Secreting testicular fluid for sperm transport
Solution
Sertoli cells are the somatic cells of the testis that are essential for testis formation and spermatogenesis. Its function includes:-
It is the nurse cells of the testicles and helps in the formation of sperms.
It secretes inhibin that inhibits FSH.
Secretion of testicular fluid is done by it which helps in sperm transport.
So the correct option is 'Forming a manchette'.
Question 9
1 / -0

Spermatogenesis occurs in

A
Vasa deferentia

B
Epididymis

C
Seminiferous tubules

D
Penis

Solution

The testes are situated outside the abdominal cavity within a pouch called scrotum. Each testis has about 250 compartments call testicular lobules. Each lobule contains 1 to 3 highly coiled seminiferous tubules in which sperms are produced or spermatogenesis occur. Each seminiferous tubules has two types of cells called male germ cells and Sertoli cells. Male germ cells undergo meiotic division whereas Sertoli cells provide nutrition to germ cells.
So, the correct option is 'Seminiferous tubules'.
Question 10
1 / -0

During spermatogenesis, the first meiotic division occurs in

A
Sertoli cells

B
Spermatids

C
Spermatozoans

D
Primary spermatocytes

E
Secondary spermatocytes

Solution

The spermatogonia present on the inside wall of seminiferous tubules multiply by mitotic division and increase in number. Each spermatogonium is diploid and contains 46 chromosomes. Some of the spermatogonia called primary spermatocytes periodically undergo meiosis. A primary spermatocyte completes its first meiotic division and forms two equal haploid cells called secondary spermatocyte which has only 23 chromosomes each.
So, the correct option is 'Primary spermatocytes'.

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Re-Attempt Weekly Quiz Competition

Human Reproduction Test - 68

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Human Reproduction Test - 68

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SHARING IS CARING

Question 1

Menopause

Menarche

Diapause

None of the above

Solution

Question 2

Myometrium

Endometrium

Perimetrium

All the above

Solution

Question 3

Sperm is viable for only 24 hours.

Sperm viability is determined by its motility.

Sperms must be concentrated in thick suspension.

It depends upon pH of medium as sperm is more active in alkaline medium/

Solution

Question 4

Germinal epithelium of testis

Germinal epithelium of ovary

Medulla of kidney

Adrenal cortex

Solution

Question 5

MSH

TSH

ADH

FSH

Solution

Question 6

Spermatogonium into primary spermatocyte

Primary spermatocyte into secondary spermatocyte

Secondary spermatocyte into spermatid

All the above

Solution

Question 7

$$22$$

$$23$$

$$44$$

$$46$$

Solution

Question 8

Nurse cells to sperms

Secreting hormone inhibin

Forming a manchette

Secreting testicular fluid for sperm transport

Solution

Question 9

Vasa deferentia

Epididymis

Seminiferous tubules

Penis

Solution

Question 10

Sertoli cells

Spermatids

Spermatozoans

Primary spermatocytes

Secondary spermatocytes

Solution

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