Q. No.In the diagrammatic sectional view of the seminiferous tubule, which structures shown in the diagram are correctly matched to the description given?
| A: | the primary source of testosterone or androgens in males |
| B: | male germ cells in the inside lining of seminiferous tubules |
| C: | spermatids released from seminiferous tubules |
| D: | Present in the inside lining of seminiferous tubules, they nourish developing sperm cells |
| 1. | Only A, B, and C | 2. | Only A, B, and D |
| 3. | Only B, C, and D | 4. | A, B, C, and D |
Subtopic: Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
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The spermatids are transformed into spermatozoa by a process called:
| 1. | Spermiation | 2. | Spermatocytogenesis |
| 3. | Spermiogenesis | 4. | Spermatolysis |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
81%
From NCERT
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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 |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
77%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Sperms constitute the majority of the volume of the semen ejaculated. |
| Reason (R): | There are about 300 million sperms per ml of the ejaculate. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
From NCERT
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In the given diagrammatic sectional view of a seminiferous tubule, cells that nourish developing sperms and the cells that undergo reduction division are respectively represented by the letters:
| 1. | B and C | 2. | B and D |
| 3. | A and E | 4. | C and E |
Subtopic: Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
69%
From NCERT
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What causes the onset of puberty in males?
| 1. | Increase in secretion of testosterone by the testis |
| 2. | Decrease in the secretion of testosterone by the testis |
| 3. | Increase in secretion of GnRH by the hypothalamus |
| 4. | Decrease in the secretion of GnRH by the hypothalamus |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
71%
From NCERT
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Leydig cells synthesize androgens under the direct influence of:
| 1. | FSH | 2. | LH |
| 3. | FSH and LH | 4. | GnRH |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
78%
From NCERT
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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 |
Subtopic: Seminiferous Tubules & Spermatogenesis | Spermiogenesis/Sperm Structure/Hormonal Regulation |
86%
From NCERT
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Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation | Fertilization |
83%
From NCERT
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Based on the image in Q40, what is the part labeled as “6”?
| 1. | Ribosomes | 2. | Golgi Apparatus |
| 3. | Centriole | 4. | Endoplasmic reticulum |
Subtopic: Spermiogenesis/Sperm Structure/Hormonal Regulation |
82%
From NCERT
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