Human Reproduction Test

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Human Reproduction Test - 97

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Weekly Quiz Competition

Question 1
1 / -0

How the FSH controls the spermatogenesis?

A
By releasing testosterone

B
By activation of spermatogonia

C
By promoting the Sertoli cells to release the ABP and inhibin

D
By promoting the Sertoli cells to release testosterone

Solution

Spermatogenesis is the process by which haploid spermatozoa develop in the seminiferous tubules of the testis. It is the process of sperm production. FSH (follicle stimulating hormone) plays an important role in the spermatogenesis. FSH stimulates the spermatogenesis by promoting the sertoli cells to release androgen binding protein (ABP) and inhibin. It also forms the blood-testis barrier.
Thus, the correct answer is 'By promoting the Sertoli cells to release the ABP and inhibin.'
Question 2
1 / -0

Half of spermatozoa are without allosomes in

A
Insects of Hemiptera and orthoptera

B
Human beings

C
Drosophila

D
All of the above

Solution

An allosome is a hetero-chromosome that differs from normal alleles in aspects like size, form, and shape. X and Y chromosomes are allosomes. The sex determination in insects of Hemiptera and Orthoptera is based on the presence or absence of X and Y chromosomes. Those zygotes with two X chromosomes develop into females and those with both X and Y chromosomes or just one X chromosome develop into males. Usually, half the gametes in insects of Hemiptera and Orthoptera lack an allosome and on fertilization with an ovum containing only chromosome result in males.
So, the correct answer is 'Insects of Hemiptera and Orthoptera'.
Question 3
1 / -0

In a twenty year old unmarried female who has never conceived and whose age of attainment of puberty was at twelve years. Approximately how many ovum would have been formed till date-

A
$$48-60$$

B
$$96-100$$

C
$$192-200$$

D
None of these

Solution

Puberty is the period of growth that bridges childhood to adulthood and results in physical and several maturities as well as the capacity for reproduction. Over half of pubertal timing is considered heritable.
So, the correct option is ''48-60'.
Question 4
1 / -0

Write in sequence

a) Implantation b) Blastomeres
c) Zygote d) Morula
e) Cleavage f) Blastocyst

A
c - a - b - d - e - f

B
c - e - b - d - f - a

C
c - a - e - d - b - f

D
b - e - f - d - a - c

Solution

The correct order or sequence of the vents given in the question is: c) Zygote -> a) Implantation -> e) Cleavage -> d) Morula -> b) Blastomeres -> f) Blastocyst
So, the correct answer should be 'c-a-e-d-b-f'.
Question 5
1 / -0

Identify the incorrect character related to male human reproductive systems.

A
Seminiferous tubules of testis is open into rete testis.

B
Seminiferous tubules of testis open into vasa efferentia through rete testis

C
Epididymis leads to vasa efferentia which ascends to the abdomen.

D
Epididymis is located along the posterior surface of each testis.

Solution

The male reproductive system is located in the pelvic region. It includes a pair of testes along with accessory ducts, glands and the external genitalia. The accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens. The seminiferous tubules of the testis open into the vasa efferentia through the rete testis. The vasa efferentia leaves the testis and open into epididymis located along the posterior surface of each testis. The epididymis leads to vas deferens that ascend to the abdomen and loops over the urinary bladder.
So, the correct option is ' Seminiferous tubules of testis open into the rete testis'.
Question 6
1 / -0

Blastulation starts in the

A
Ovaries

B
Ampulla of Fallopian tubes

C
Isthmus of Fallopian tubes

D
Uterus
Question 7
1 / -0

The key events in embryo development are given below which is the correct order of seequences
i) organogenesis ii) Fertilization iii) Gastrulation iv) Neurulation v) Cleavage

A
v $$\rightarrow$$ ii $$\rightarrow$$ iv $$\rightarrow$$ i $$\rightarrow$$ iii

B
ii $$\rightarrow$$ iii $$\rightarrow$$ v $$\rightarrow$$ i $$\rightarrow$$ iv

C
iii $$\rightarrow$$ iv $$\rightarrow$$ ii $$\rightarrow$$ i $$\rightarrow$$ v

D
ii $$\rightarrow$$ v $$\rightarrow$$ iii $$\rightarrow$$ i $$\rightarrow$$ iv
Solution
- After an egg has been fertilized and has been implanted in the uterus, the developing form is known as the embryo. Organogenesis takes place during this embryonic phase. It is the process by which the three germ tissue layers of the embryo, which are the ectoderm, endoderm, and mesoderm, develop into the internal organs of the organism.
- Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the Fallopian tube.
- Gastrulation is a phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a multilayered structure known as the gastrula.
- The mitotic division starts as the zygote moves through the isthmus of the oviduct called cleavage towards the uterus.
- Neurulation in vertebrates results in the formation of the neural tube, which gives rise to both the spinal cord and the brain.
- So, the correct option is " ii → v → iii → i → iv ".
Question 8
1 / -0

The sperms undergo physiological maturation, acquiring increased motility and fertilising capacity in?

A
Seminiferous tubules

B
Vasa efferentia

C
Epididymis

D
Vagina

Solution

The sperms are produced within the walls of the seminiferous tubules. The sperms migrate from the seminiferous tubules to the epididymis. In the head of the epididymis, the sperms undergo physiological maturation acquiring increased motility and fertilizing capacity. Then, they pass down into the tail of the epididymis where they are stored for a short period before entering the vas deferens.

So, the correct answer is option C.
Question 9
1 / -0

What is the number of chromosomes in primary spermatocyte of human?

A
$$46$$

B
$$44$$

C
$$23$$

D
$$22$$

Solution

Spermatocytes are a type of male gametocytes in human. There are two types of spermatocytes: primary spermatocytes and secondary spermatocytes. Primary spermatocytes are diploid cells which consist of 46 chromosomes in each cell. Each secondary spermatocyte contains 23 chromosomes because they are haploid cells. Thus the correct answer is option A, 46.
Question 10
1 / -0

Fructose is present in the secretion of?

A
Corpus spongiosum

B
Seminal vesicles

C
Urethra

D
Tyson's gland

Solution

The secretion of the seminal vesicles constitutes the bulk of the seminal fluid (semen). It is a thick fluid that contains the sugar fructose, proteins, citric acid, inorganic phosphorus, potassium, and prostaglandins.

So, ' the correct option is 'Seminal vesicles'.

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Human Reproduction Test - 97

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Human Reproduction Test - 97

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SHARING IS CARING

Question 1

By releasing testosterone

By activation of spermatogonia

By promoting the Sertoli cells to release the ABP and inhibin

By promoting the Sertoli cells to release testosterone

Solution

Question 2

Insects of Hemiptera and orthoptera

Human beings

Drosophila

All of the above

Solution

Question 3

$$48-60$$

$$96-100$$

$$192-200$$

None of these

Solution

Question 4

c - a - b - d - e - f

c - e - b - d - f - a

c - a - e - d - b - f

b - e - f - d - a - c

Solution

Question 5

Seminiferous tubules of testis is open into rete testis.

Seminiferous tubules of testis open into vasa efferentia through rete testis

Epididymis leads to vasa efferentia which ascends to the abdomen.

Epididymis is located along the posterior surface of each testis.

Solution

Question 6

Ovaries

Ampulla of Fallopian tubes

Isthmus of Fallopian tubes

Uterus

Question 7

v $$\rightarrow$$ ii $$\rightarrow$$ iv $$\rightarrow$$ i $$\rightarrow$$ iii

ii $$\rightarrow$$ iii $$\rightarrow$$ v $$\rightarrow$$ i $$\rightarrow$$ iv

iii $$\rightarrow$$ iv $$\rightarrow$$ ii $$\rightarrow$$ i $$\rightarrow$$ v

ii $$\rightarrow$$ v $$\rightarrow$$ iii $$\rightarrow$$ i $$\rightarrow$$ iv

Solution

Question 8

Seminiferous tubules

Vasa efferentia

Epididymis

Vagina

Solution

Question 9

$$46$$

$$44$$

$$23$$

$$22$$

Solution

Question 10

Corpus spongiosum

Seminal vesicles

Urethra

Tyson's gland

Solution

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