Each seminiferous tubule is lined by male germ cells called:
1. | Spermatogonia | 2. | Primary spermatocytes |
3. | Sertoli cells | 4. | Leydig cells |
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FSH:
1. | Acts on Sertoli cells and stimulates secretion of some factors that help in spermiogenesis |
2. | Acts on Sertoli cells and inhibits secretion of some factors that help in spermiogenesis |
3. | Acts on Leydig cells and stimulates secretion of some factors that help in spermiogenesis |
4. | Acts on Leydig cells and inhibits secretion of some factors that help in spermiogenesis |
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Which cell in the sperm lineage undergoes reduction division [meiosis]?
1. | Type A spermatogonia | 2. | Type B spermatogonia |
3. | Primary spermatocyte | 4. | Secondary spermatocyte |
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The testes are situated outside the abdominal cavity within a pouch called the scrotum. This is necessary as:
1. | The scrotum can contain lengthy ducts for the transfer of sperms |
2. | Scrotum helps in maintaining the low temperature of the testes necessary for spermatogenesis |
3. | Scrotum reduces the pressure around the testes necessary for spermatogenesis |
4. | Scrotum can store huge amounts of sperms |
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The final release of sperms from the seminiferous tubules is called:
1. | Spermiation | 2. | Emission |
3. | Retrograde ejaculation | 4. | Ejaculation |
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What is the number of chromosomes in each secondary spermatocyte?
1. | 23 | 2. | 46 |
3. | 69 | 4. | 92 |
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The ducts of the seminal vesicles open into:
1. | Ejaculatory duct | 2. | Rete testis |
3. | Urethra | 4. | Vas deferens |
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Which of the following helps spermatids in their transformation to sperms?
1. | Leydig cells | 2. | Type B spermatogonia |
3. | Type A spermatogonia | 4. | Sertoli cells |
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Sperms are produced in:
1. | Rete testes | 2. | Epididymis |
3. | Seminiferous tubules | 4. | Vas deferens |
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Spematogenesis begins:
1. | Before birth | 2. | Just before birth |
3. | Just after birth | 4. | At puberty |
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