题目内容

Sarcomere is ()

A segment extending from one Z-line to the next Z-line in muscle fiber
B. A segment extending from one Z-line to the next Z-line in myofibril
C. A segment extending from one M-line to the next M-line in muscle fiber
D. A segment extending from one M-line to the next M-line in myofibril
E. A segment extending from one H band to the next H band in myofibril

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During fertilization, spermatozoon enter ()

A. oogonia
B. primary oocyte
C. secondary oocyte
D. secondary follicle
E. primordial follicle

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Which does not belong to seminiferous tubule? ()

A. Sertoli cell
B. interstitial cell
C. spermatogonium
D. primaryspermatocyte
E. spermatid

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Which is wrong about the structure of testis? ()

A. Thetunica albuginea is thickened on the posterior surface of testis to form mediastinum
B. The fibrous septa from mediastinum penetrates radially the testis, dividing it into pyramidal lobules
C. Each lobule is occupied by 1-4 seminiferous tubules
D. Theseminiferous tubules go into mediastinum testis to form rete testis
E. The tubulus rectus go into mediastinum testis to form rete testis

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Nephron is composed of ()

A. renal corpuscle, medullary loop
B. proximal tubule, thin segment, distal tubule
C. renal corpuscle, renal tubule and collecting duct
D. renal tubule, collecting duct
E. renal corpuscle, renal tubule

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