[单选题]
The micrograph shows spermatogen
,8vqlspmd-b(u3o4 vu esis inside a mammalian seminiferous tubule. W
/9aio/0m8ac0*81c p m pd lhrlfb)lsrhich
aar)*/8r0b 9mc8 lm1f s cppdo/illh0arrow indicates a spermatocyte?
A.
B.
C.
D.
参考答案:
C
本题详细解析:
Arrow C is pointing to a round cell with a large nucleus, that is closer to the middle of the tubule than the basement membrane. Choice C is correct.
Choice A is incorrect as it is pointing to the space between the cells (interstitial cells). Choice B is incorrect as it is pointing to spermatids, as indicated by the presence of tails and smaller nuclei. Choice D is incorrect as it is pointing to the basement membrane, the membrane surrounding the seminiferous tubules.
