Human Reproduct...

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.

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.

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.

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. 

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.

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.

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.

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.

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.

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.