Human Reproduction Test 13

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Human Reproduction Test 13

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Question 1
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : The region outside the seminiferous tubules is called interstitial spaces, which contain Leydig's cells.
Reason (R) : Leydig's cells synthesize and secrete testicular hormones called androgen.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Hypothalamus releases GnRH. This hormone stimulates the secretion of LH, which further acts on interstitial cells of Leydig and induces the release of androgen.
Question 2
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Urethra in human male act as a urogenital canal.
Reason (R) : Urethra carries only urine while sperms are carried by vasa deferentia only.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Urethra is the canal through which both urine and semen is discharged therefore it is called urogenital canal.
Question 3
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Large members of mitochondria are present in the middle piece of sperm.
Reason (R) : Numerous mitochondria in the middle piece of sperm produce energy which is required for their movement.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Mitochondria is a powerhouse organelle. It stores energy in the form of ATP. This energy helps in sperm motility.
Question 4
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : In human male, testes are extra- abdominal and lie in scrotal sacs.
Reason (R) : Scrotum acts as thermoregulator and keeps temperature lower by 2°C for normal sperm production.

A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
Assertion (A) is true but reason (R) is false.

D
Assertion (A) is false but reason (R) is true.

Solution

The scrotum is a bag-like structure that helps to protect the testicles. Testicles make sperm and for this, they need to be cooler than the inside of the body. This is why the scrotum is located outside the body.
Question 5
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Vasa efferentia develop from rete testis.
Reason (R) : Sperm conduction takes place by the ciliary current.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Vasa efferentia are short, straight tubes, developed from rete testis. They help in sperm conduction which takes place by the ciliary current.
Question 6
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : The secretory phase in the human menstrual cycle is also called the luteal phase.
Reason (R) : During the luteal phase development of corpus luteum and secretion of progesterone occurs.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

The luteal phase begins after ovulation. It lasts about 14 days, and ends just before a menstrual period. In this the ruptured follicle closes after releasing the egg and forms the corpus luteum.
Question 7
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Oxytocin helps in parturition.
Reason (R) : Oxytocin acts on uterine muscle and causes expulsion of the foetus.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Oxytocin acts on uterine muscles and also increases the production of prostaglandins, which increase the contractions further.
Question 8
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion: The gamete formed in males determines the sex of the offspring.
Reason: Sex determination in human depend upon cumulative effect of some genes of X and Y chromosomes.

A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
Assertion (A) is true but reason (R) is false.

D
Assertion (A) is false but reason (R) is true.

Solution

Human females have XX chromosomes and males have XY chromosomes. The sperm may contain either X or Y chromosome. The sperm is the factor in deciding the sex of the child. If the sperm carries an X chromosome, it will fuse with the egg’s X chromosome to form a female. If the sperm carries a Y chromosome, it will result in a male child.
Polygenic traits are the genes which interact to have an effect on the same character. There is no such interaction between the genes on the X and Y chromosome. The presence of the chromosome decides the sex of the child.
Question 9
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Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : Endometrium is a mucosal tissue made up of two layers.
Reason (R) : It is an inner lining of the uterus. Each month it thickens and renews itself, preparing for pregnancy.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

It's two layers-the stratum functionalis and stratum basalis. If conception takes place, the embryo implants into the endometrium.
Question 10
1 / -0

Directions: In the following questions a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion (A) : The leydig cells of testis are present outside the seminiferous tubules.
Reason (R) : Testis helps to synthesise and secrete hormones called androgens.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Leydig cells are under the action of ICSH or Interstitial cell-stimulating hormone, which is commonly known as Luteinizing hormone. In males, it is responsible for the growth and development of Leydig cells located in the testes. Leydig cells are located outside the seminiferous tubules which are known as the interstitial spaces. These cells are further responsible for the synthesis and secretion of a class of testicular hormones known as androgens.

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Human Reproduction Test 13

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Human Reproduction Test 13

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Question 1

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 2

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 3

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 4

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

Assertion (A) is true but reason (R) is false.

Assertion (A) is false but reason (R) is true.

Solution

Question 5

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 6

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 7

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 8

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

Assertion (A) is true but reason (R) is false.

Assertion (A) is false but reason (R) is true.

Solution

Question 9

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 10

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

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