Human Reproduction Test

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Human Reproduction Test - 86

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Question 1
1 / -0

The combined length of seminiferous tubules of man is about .............. meters.

A
100 - 200

B
200 - 400

C
400 - 600

D
600 - 800

Solution

Seminiferous tubules are located within the testes for spermatogenesis. They are known as the functional unit of a testis. They are the site for the maturation and transportation of the sperm cells within the male testes. They are made up of Sertoli cells surrounded by spermatogenic cells. The total length is approximately 400-600 metres. Hence, the correct answer is option C.
Question 2
1 / -0

Pseudostratified columnar epithelium lines is present in which one of the following?

A
Vas deferens

B
Buccal cavity

C
Bowman's capsule

D
All of the above

Solution

A pseudostratified epithelium is a type of epithelium that has a single layer of cells in such a way that it looks like stratified epithelium. Pseudostratified columnar epithelium lines the vas deferens.
So, the correct answer is option A.
Question 3
1 / -0

Innermost layer of shells of eggs is made up of

A
Esterified glycosides

B
Proteins

C
Carbohydrates

D
Phosphates

Solution

The multilayered structure of the eggshell provides resistance to the egg from gastric juice. The outer layer is made up of lipoprotein, the middle layer of chitin and keratinized protein, while the inner layer consists of the esterified glycoside known as ascaroside. Hence, the correct answer is option A.
Question 4
1 / -0

Human semen is liquid at ejaculation but soon coagulates (within 15 mins) and again undergo secondary liquification by the enzyme released by the prostate. Enzyme is

A
Erepsin

B
Cathepsin

C
Lysin

D
Acid phosphatase

Solution

An antibiotic, seminal plasmin and prostatic enzymes that coagulate and then liquify semen to aid in its movement through the uterine cervix are present in semen. After ejaculation, liquid semen coagulates within 15 minutes due to the presence of clotting proteins. After about 10-20 minutes, semen reliquifies because acid phosphatase.
Therefore, the correct answer is option D.
Question 5
1 / -0

The muscles helping in getting warmth in testis are

A
Cremaster only

B
Dartos and cremaster

C
Gubernaculum

D
Mesorchium

Solution

The dartos fascia is a connective tissue found in the scrotum. It lies just below the skin, which places it just superficial to the external spermatic fascia in the scrotum. In the scrotum, it consists mostly of smooth muscle. In the scrotum, the tunica dartos and cremaster acts to regulate the temperature of the testicles, which promotes spermatogenesis. Hence, the correct answer is option option B.
Question 6
1 / -0

The release of ovum from Graafian follicles takes place during ........ day.

A
10$$^{th}$$ - 12$$^{th}$$

B
14$$^{th}$$ - 16$$^{th}$$

C
Last 2 days of the menstrual cycle

D
8$$^{th}$$ - 10$$^{th}$$

Solution

During menstruation cycle, gonadotropins (LH and FSH) stimulates follicular development as well as secretion of estrogens by the growing follicles. Both LH and FSH reached at maximum level in the middle of the cycle (about 14$$^{th}$$ day). Rapid secretion of LH leads to LH surge and rupture the Graafian follicle for ovulation to occur.
Thus, the correct answer is option B.
Question 7
1 / -0

The duration of the survival of the sperms in the female genital tract is the longest of 4 years in

A
Guppy fish (Lebistes)

B
Bats

C
Turtle (Malaclemys)

D
All of the above

Solution

In most mammals, sperm is capable of fertilizing eggs for only a few days after copulation. A sperm has short lifespan sets a narrow time frame for fertilization. In contrast, female bats are capable of storing sperms for longer durations of several months or even 3-4 years. In the case of hibernating temperate species, the duration of storage can be much longer extending to years.
Question 8
1 / -0

During the course of development of cells in various regions of an embryo become different in appearance and perform diverse function this is called

A
Gastrulation

B
Differentiation

C
Metamorphosis

D
Organisation

Solution

After the formation of zygote, the cells undergo rapid division which forms a mass of cell which undergoes differentiation to form specific organs which perform a specialized function.
So, the correct answer is option B.
Question 9
1 / -0

Cortical granules are absent in

A
Fish

B
Frog

C
Man

D
Rat

Solution

Cortical granules are regulatory secretory organelles found within oocytes of many invertebrates and vertebrates, including mammals. The extruded contents of the granules are thought to play a role in the prevention of polyspermy. It is absent in rat. The absence of cortical granules in mouse egg has been suggested to result from the absence of golgi complexes. Hence, option D is correct.
Question 10
1 / -0

Which one of the following statements about human sperm is correct?

A
Acrosome serves no particular function.

B
Acrosome has a conical pointed structure used for piercing and penetrating the egg resulting in fertilization.

C
The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization.

D
Acrosome serves as a sensory structure leading the sperm towards the ovum.

Solution

Acrosomes contain digestive enzymes like hyaluronidase and lysins, which helps in breaking down the outer membrane of the ovum called as the zona pellucida, allowing the haploid nucleus in the sperm cell to join the haploid nucleus in the ovum, thus enabling fertilization. Hence, the correct answer is option C.

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Re-Attempt Weekly Quiz Competition

Human Reproduction Test - 86

Result

Human Reproduction Test - 86

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SHARING IS CARING

Question 1

100 - 200

200 - 400

400 - 600

600 - 800

Solution

Question 2

Vas deferens

Buccal cavity

Bowman's capsule

All of the above

Solution

Question 3

Esterified glycosides

Proteins

Carbohydrates

Phosphates

Solution

Question 4

Erepsin

Cathepsin

Lysin

Acid phosphatase

Solution

Question 5

Cremaster only

Dartos and cremaster

Gubernaculum

Mesorchium

Solution

Question 6

10$$^{th}$$ - 12$$^{th}$$

14$$^{th}$$ - 16$$^{th}$$

Last 2 days of the menstrual cycle

8$$^{th}$$ - 10$$^{th}$$

Solution

Question 7

Guppy fish (Lebistes)

Bats

Turtle (Malaclemys)

All of the above

Solution

Question 8

Gastrulation

Differentiation

Metamorphosis

Organisation

Solution

Question 9

Fish

Frog

Man

Rat

Solution

Question 10

Acrosome serves no particular function.

Acrosome has a conical pointed structure used for piercing and penetrating the egg resulting in fertilization.

The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization.

Acrosome serves as a sensory structure leading the sperm towards the ovum.

Solution

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