Human Reproduction Test

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Human Reproduction Test - 55

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Weekly Quiz Competition

Question 1
1 / -0

In human foetus, the heart begins to beat at developmental age of

A
$$4^{th}$$ week

B
$$3^{rd}$$ week

C
$$6^{th}$$ week

D
$$8^{th}$$ week
Solution
Correct option A
Explanation for the correct option:
The development of heart in human foetus begins around 4th week of the pregnancy.
The heart is made up of two tubes that possess fused in the middle region, creating a trunk with four tubes branching off.
The heart begins to beat after that , and it may be possible to detect its vibrations using vaginal ultrasound.
Question 2
1 / -0

Which of the following cells is the product of a meiotic cell division?

A

B

C

D

Solution

The sperm cell is the male gamete formed by the process of meiosis from the spermatogonium. Thus the correct answer is option B.
Question 3
1 / -0

Which of the following shows the correct route, that the sperm takes after leaving the testis?

A
Epididymis - vas deferens - ejaculatory duct - urethra

B
Vas deferens - epididymis - urethra - ejaculatory duct

C
Ejaculatory duct - epididymis - vas deferens - urethra

D
Epididymis - vas deferens - urethra - ejaculatory duct

Solution

The epididymis is part of the male reproductive system which collects sperm from testes and stores. The vas deferens is the duct which transports sperm from the epididymis to the ejaculatory ducts in anticipation of ejaculation. In the human male, the urethra opens at the end of the penis. The urethra provides an exit for urine as well as semen during ejaculation.
Thus, the correct answer is option A.
Question 4
1 / -0

Which one of these is not an accessory glands in male reproductive system?

A
Prostate gland

B
Seminal vesicle

C
Cowper's gland

D
Bartholin's gland

Solution

Bartholin's gland is not an accessory gland in male reproductive system. It is present in females. It is located slightly posterior and to the left and right of the opening of the vagina. Bartholin's glands secrete mucus to provide vaginal lubrication.
Male accessory glands in humans are the seminal vesicles, prostate gland, and the Cowper's gland (also called as bulbourethral glands). These glands secrete fluid for the nourishment of sperms. Thus, the correct answer is option D.
Question 5
1 / -0

In a human foetus the limbs and digits develop after

A
First trimester

B
8 weeks

C
12 weeks

D
5th month
Solution
In humans, the zygote gets cleaved rapidly to form a ball of cells which undergoes gastrulation and forms three germ layers.
The three germ layers are then subjected to organogenesis which leads to the development of organs.
After 8 weeks of pregnancy or by the end of second month limbs and digits develop in the foetus.
Thus, the correct answer is an option (B).
Question 6
1 / -0

The part of the female reproductive system that produces the eggs?

A
Ovary

B
Epididymis

C
Cervix

D
Fallopian tube
Question 7
1 / -0

The site of maturation of human sperms is the

A
Seminiferous tubule

B
Interstitial cells

C
Epididymis

D
Prostate gland
Solution
- After spermatogenesis, immature sperms are pushed out of the seminiferous tubules by other sperms and the fluids produced by the Sertoli cells.
- As sperm enter the epididymis, they complete maturation, stimulated in part by protein secretions from the epididymal cells.
Thus, the correct answer is option C.
Question 8
1 / -0

Which of the following describes the major difference between the production of egg cells (oogenesis) and the production of sperm cells (spermatogenesis)?

A
During spermatogenesis, 4 diploid cells are produced, but during oogenesis, 4 haploid cells are produced.

B
During spermatogenesis. 3 polar bodies are produced along with one sperm cell, while oogenesis produces 4 egg cells

C
During spermatogenesis 4 diploid sperm cells are produced, and during oogenesis 4 diploid egg cells are produced.

D
During spermatogenesis, 4 haploid sperm cells are produced while oogenesis produces 1 haploid egg cell and 3 polar bodies.

E
During spermatogenesis. 4 haploid sperm cells are produced while oogenesis produces 4 haploid egg cells.

Solution

In spermatogenesis, primary spermatocyte undergoes first meiotic division to form two haploid secondary spermatocytes. The secondary spermatocytes with the help of second meiotic division produces four haploid sperms.
In oogenesis, diploid primary oocyte develops by mitotic division of oogonium. It undergoes the first meiotic division and give rise to a haploid secondary oocyte and a small polar body. Secondary oocyte by meisis II forms a secondary polar body and a ootid and polar body forms two haploid polar body.
Question 9
1 / -0

The hormone which acts on Sertoli cells and stimulates the process of spermiogenesis is

A
Androgen

B
LH

C
GnRH

D
FSH
Solution
- Spermiogenesis is the process which involves the maturation of spermatid into motile spermatozoa.
- FSH stimulates both the production of androgen-binding protein (ABP) by Sertoli cells and is critical for the initiation of spermatogenesis.
- Hence FSH plays an important role in spermiogenesis.
- Thus, the correct answer is option D.
Question 10
1 / -0

Choose the correct answer from the four options given below.
A single highly coiled tube where sperms are stored, gets concentrated and mature is known as

A
Epididymis

B
Vas efferntia

C
Vas deferens

D
Seminiferous tubule

Solution

Sperm is produced in seminiferous tubules of testes and transported from rete testes to epididymis for storage and maturation via efferent ductules. From epididymis, sperms enter a vas deferens which transports them to an ejaculatory duct. Thus, the correct answer is option A.