Spermatogenesis
A. seminiferous tubules
B. epididymis
C. Sertoli cells
D. Leydig cells
ANSWER – A
A. seminiferous tubules
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Seminiferous tubules of the testes are the starting point for the process of Spermatogenesis.
Spermatogonial stem cells adjacent to the inner tubule wall divide in a centripetal direction.
Spermatogenesis begins at the walls and proceeding into the innermost part, or lumen to produce immature sperm.
A. seminiferous tubules
B. epididymis
C. Sertoli cells
D. Leydig cells
ANSWER -B.
B. epididymis
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Seminiferous tubules of the testes are the starting point for the process of Spermatogenesis.
Maturation of spermatozoa occurs in- epididymis
A. 7 days
B. 21 days
C. 56 days
D. 74 days
ANSWER -D.
D. 74 days
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Duration of Spermatogenesis –
– 74 days- according to tritium-labelled biopsies.
– 120 days – according to DNA clock measurements
A. spermatozoids
B. spermatids
C. primary spermatocyte
D. secondary spermatocytes
ANSWER -C.
C. primary spermatocyte
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primary spermatocyte – diploid (2N) / 46
A. Spermatidogenesis
B. Spermiogenesis
C. Spermiation
D. spermatidogenesis (meiosis II)
ANSWER -B.
B. Spermiogenesis
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spermiogenesis, the spermatids begin to form a tail by growing microtubules on one of the centrioles, which turns into basal body.
Spermiogenesis is the final stage of spermatogenesis
spermatids develop into mature spermatozoa.
At the beginning of the Spermiogenesis stage, the spermatid is a more or less circular cell and by the end of the process, it is transformed into an elongated spermatozoon, complete with a head, midpiece, and tail.
A. Spermatidogenesis
B. Spermiogenesis
C. Spermiation
D. spermatidogenesis (meiosis II)
ANSWER -C.
C. Spermiation
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Spermiation –
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Spermiation is the process by which mature spermatids are released from the supporting somatic Sertoli cells into the lumen of the seminiferous tubule.
It is a critical determinant of the number of sperm entering the epididymis, and thus the sperm content of the ejaculate.
A. Nurse cell
B. Leydig cell
C. Sertoli cell
D. Spermatocytes
ANSWER -B.
B. Leydig cell
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– Leydig cells, also known as interstitial cells of the testes
– Found adjacent to the seminiferous tubules in the testicle
– Produce testosterone in the presence of luteinizing hormone (LH)
A. Spermatids
B. Leydig cell
C. Sertoli cell
D. Spermatocytes
ANSWER -C.
C. Sertoli cell
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Sertoli cell – “nurse” cell of the testicles that is part of a seminiferous tubule and helps in the process of spermatogenesis
