Negative feedback in spermatogenesis is by
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Sertoli cells produce the hormone inhibin which inhibits pituitary FSH (negative feedback) Reference: Ganong, 25th edition Page no.421
Male Reproductive Physiology is part of the Reproductive Physiology section of Physiology. Practise 31 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
Inhibin feedback on FSH, Leydig cell testosterone, the Sertoli blood–testis barrier and capacitation via CatSper channels headline these Male Reproductive Physiology MCQs, which test spermatogenesis as high-yield NEET PG revision.
Sertoli cells produce the hormone inhibin which inhibits pituitary FSH (negative feedback) Reference: Ganong, 25th edition Page no.421
Sertoli cells produce the hormone inhibin which inhibits pituitary FSH (negative feedback) LH acts on the Leydig cells of testis to increase the production and secretion of testosterone which inhibits LH (negative feedback). Reference: Ganong, 25th edition Page no.417
Testosterone secreted by in Male - Leydig cells Reference: Ganong, 25th edition Page no.396
Adjacent sertoli cells form blood-testis barrier Reference: Ganong, 25th edition Page no.418
Vaginal secretion is acidic but it is neutralized by the alkaline characteristic of the prostatic fluid in semen Reference: Ganong, 25th edition Page no.421
Prolonged administration of testosterone causes azoospermia by suppression of pituitary gonadotropins Reference: Ganong, 25th edition Page no.422
Explanation: Ejaculation is a coordinated process that occurs in two main phases: emission and expulsion . During the expulsion phase , the sequence of muscle activity proceeds as follows: Ischiocavernosus muscle contraction : These muscles contract first to help maintain penile rigidity by compressing the base of the corpora cavernosa , thereby increasing intracavernosal pressure . Relaxation of the external urethral sphincter : This relaxation permits the passage of semen from the prostatic urethra into the penile urethra . Bulbospongiosus muscle contraction : Finally, these muscles contract rhythmically to forcefully expel semen from the penile urethra during ejaculation. Hence option A,B and D are incorrect
Sperm acquires the capability of motility in epididymis Forward progressive motility of sperm requires activation of a Ca 2+ channel called CatSper leading to increased permeability to calcium CatSper is present in the principal piece of sperm Reference: Ganong, 25th edition Page no.421
Inhibin feedback on FSH, Leydig cell testosterone, the Sertoli blood–testis barrier and capacitation via CatSper channels headline these Male Reproductive Physiology MCQs, which test spermatogenesis as high-yield NEET PG revision.
MedLadder includes 31 curated MCQs for Male Reproductive Physiology under Physiology (Reproductive Physiology), covering NEET PG, FMGE, INI-CET and NEET SS preparation.