Human Reproduction Test

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Human Reproduction Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Secretory phase of human menstrual cycle is also called

A
Luteal phase and lasts for $$6$$ days

B
Luteal phase and lasts for $$13$$ days

C
Follicular phase and lasts for $$13$$ days

D
Follicular phase and lasts for $$6$$ days

Solution

Correct answer: B

Explanation:

The menstrual cycle begins with the menses, this is followed by the follicular phase.

During this stage secretion of gonadotropins (LH and FSH) and estrogens.

In between the cycle, rapid secretions of LH and FSH increase lead to the LH surge and thus ovulation.

Ovum lasts for 1 day only. It is further followed by the luteal phase also called a secretory phase during which the remaining parts of the Graafian follicle change into corpus luteum.

Thus, the proper answer is 'Luteal phase and lasts for 13 days.
Question 2
1 / -0

Hormone responsible for spermatogenesis is

A
Androgen

B
Progesterone

C
Testosterone

D
None of these

Solution

The pituitary gland releases follicle stimulating hormone (FSH) and enters the testes which stimulate the Leydig cell that releases the androgen known as the testosterone which leads to the formation of sperms in a process called as spermatogenesis.
So the correct option is 'Testosterone'.

Question 3

1 / -0

Identify the correct match.

	Accessory gland		Function
(i)	Seminal vesicle	(a)	Lubricates vagina
(ii)	Prostate gland	(b)	Provides energy, coagulation of sperms
(iii)	Cowper's gland	(c)	Neutralises acidity of vagina

i-b, ii-c, iii-a

i-c, ii-b, iii-a

i-a, ii-c, iii-b

i-c, ii-a, iii-b

Solution

Accessory glands	Function
Seminal vesicle	Provides energy, coagulation of sperm (It is a thick fluid that contains the sugar fructose, proteins, citric acid, inorganic phosphorus, potassium, and prostaglandins).
Prostate gland	Neutralises vagina (It contains alkaline pH which helps in neutralizing the acidity of the vagina)
Cowper's gland	Lubricates vagina (contains mucous like secretion that helps in lubrication)

Question 4

1 / -0

Match the lists and find the correct option.

	I		II
a	Leydig cells	I	Carry sperms from seminiferous tubules to vasa efferentia
b	Sertoli cells	II	Nourish sperms
c	Rete testis	III	Secretion testosterone
d	Corpus luteum	IV	Secretion of progesterone
		V	Secretion of estrogen

a-II, b-III, c-V, d-IV

a-III, b-II, c-I, d-IV

a-III, b-II, c-V, d-IV

a-II, b-III, c-I, d-IV

Solution

Column I	Column II
Leydig cells	Secreted testosterone (primary male hormone)
Sertoli cells	Nourishes sperm (also known as nurse cell as they provide nutrients to sperms)
Rete testis	Carry sperms from seminiferous tubules to vasa efferentia
Corpus luteum	Secretion of )progesterone (essential to carry out pregnancy

Question 5
1 / -0

Which of the following statement is wrong?

A
Sertoli cells provide nutrition to the developing male germ cells.

B
Leydig cells synthesis and secrete androgens.

C
Secretions of acrosome help the sperm to enter the cytoplasm of the ovum.

D
Secondary spermatocytes are diploid.

E
Fluid filled cavity in tertiary follicle is called antrum.
Solution
Correct Answer: D
Explanation:
Generally, the ploidy of the primary spermatocyte is diploid (2N).
After the completion of Meiosis I, two secondary spermatocytes are formed. Those are haploid (N) cells that contain half the number of chromosomes.
Each secondary spermatocyte forms two spermatids by Meiosis II.
Hence, the correct option is 'Secondary spermatocytes are diploid'.
Question 6
1 / -0

Human primary spermatocyte contains

A
$$22$$ autosomes and a X-chromosome

B
$$22$$ autosomes and a Y-chromosome

C
$$22$$ autosomes and a X or Y-chromosome

D
$$22$$ pairs of autosomes and XY chromosomes

Solution

Human primary spermatocyte has 23 pair or 46 chromosomes in which one pair is responsible for the sex determination of the progeny and it is known as sex chromosome which is either X or Y rest are allosomes or autosomes and responsible for the genetic information.
So the correct option is '22 pairs of autosomes and XY chromosomes'.
Question 7
1 / -0

If spermatogenesis proceeds rapidly, inhibin is released. Inhibin reduces secretion of

A
Luteinizing hormone

B
Follicle stimulating hormone

C
Testosterone

D
Interstitial cell stimulating hormone

Solution

Inhibin hormone that is secreted by Sertoli cells in males suppresses the effect of a follicular stimulating hormone or FSH secreted by the pituitary gland and reduces the process of spermatogenesis.
So the correct option is 'Follicle stimulating hormone'.
Question 8
1 / -0

During spermatogenesis, the diploid cells are

A
Primary spermatocyte and spermatogonium

B
Spermatogonium and spermatid

C
Secondary spermatocyte and spermatid

D
Primary spermatocytes and spermatid

Solution

Spermatogenesis is the meiotic division of spermatogonia to give rise to spermatozoa. The diploid spermatogonium mitotically gives rise to the diploid primary spermatocytes which further, via meiosis, give rise to haploid secondary spermatocytes, spermatids, and spermatozoids.
So, the correct answer is 'Primary spermatocyte and spermatogonium'.
Question 9
1 / -0

Arrange male reproductive accessory organs based on the amount of secretion poured into the urethra.
(I) Prostate gland
(II) Seminal vesicles
(III) Bulbourethral glands.

A
i $$>$$ ii $$>$$ iii

B
iii $$>$$ ii $$>$$ i

C
ii $$>$$ iii $$>$$ i

D
ii $$>$$ i $$>$$ iii

Solution

Semen is produced as a combination of secretions from the different regions of the male reproductive tract. Each fraction differs in chemical composition and function. The combination of these fractions during ejaculation results in the optimal environment for transporting sperm to the endocervical mucus in the female.
The composition includes:-
Seminal Vesicle‎: ‎1.5-2ml (50-70%) Prostate‎: ‎0.6-0.9ml (15-25%)
Bulbourethral Glands‎: ‎< 0.15ml (<=5%).
So the correct option is 'ii > i > iii'
Question 10
1 / -0

Secondary spermatocytes undergo second meiotic division during spermatogenesis to produce

A
Spermatozoa

B
Diploid spermatids

C
Primary spermatocytes

D
Spermatogonia

E
Haploid spermatids

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. They differentiate to form spermatids.
So, the correct option is 'Haploid spermatids'.

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Human Reproduction Test - 69

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Human Reproduction Test - 69

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Question 1

Luteal phase and lasts for $$6$$ days

Luteal phase and lasts for $$13$$ days

Follicular phase and lasts for $$13$$ days

Follicular phase and lasts for $$6$$ days

Solution

Question 2

Androgen

Progesterone

Testosterone

None of these

Solution

Question 3

i-b, ii-c, iii-a

i-c, ii-b, iii-a

i-a, ii-c, iii-b

i-c, ii-a, iii-b

Solution

Question 4

a-II, b-III, c-V, d-IV

a-III, b-II, c-I, d-IV

a-III, b-II, c-V, d-IV

a-II, b-III, c-I, d-IV

Solution

Question 5

Sertoli cells provide nutrition to the developing male germ cells.

Leydig cells synthesis and secrete androgens.

Secretions of acrosome help the sperm to enter the cytoplasm of the ovum.

Secondary spermatocytes are diploid.

Fluid filled cavity in tertiary follicle is called antrum.

Solution

Question 6

$$22$$ autosomes and a X-chromosome

$$22$$ autosomes and a Y-chromosome

$$22$$ autosomes and a X or Y-chromosome

$$22$$ pairs of autosomes and XY chromosomes

Solution

Question 7

Luteinizing hormone

Follicle stimulating hormone

Testosterone

Interstitial cell stimulating hormone

Solution

Question 8

Primary spermatocyte and spermatogonium

Spermatogonium and spermatid

Secondary spermatocyte and spermatid

Primary spermatocytes and spermatid

Solution

Question 9

i $$>$$ ii $$>$$ iii

iii $$>$$ ii $$>$$ i

ii $$>$$ iii $$>$$ i

ii $$>$$ i $$>$$ iii

Solution

Question 10

Spermatozoa

Diploid spermatids

Primary spermatocytes

Spermatogonia

Haploid spermatids

Solution

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