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.
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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) : 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.