NEETZoologyHuman Reproduction
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In human males, spermatids are not immediately released into the lumen of the seminiferous tubules after their formation. Reason (R): Spermatids must undergo spermiogenesis to transform into spermatozoa, after which their heads become embedded in Sertoli cells before being released by spermiation.
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A)
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A)
- C(A) is true but (R) is false
- D(A) is false but (R) is true
Correct answer
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
Step-by-step solution
Assertion (A) is true because spermatids, which are formed after the second meiotic division, are non-motile and round cells that remain in the seminiferous tubules for further development. Reason (R) is true and correctly explains the Assertion. Spermatids undergo a process of differentiation called spermiogenesis to become functional, motile spermatozoa (sperms). Following this morphological transformation, the sperm heads become embedded in the Sertoli cells to draw nourishment. Only after this maturation proces