Q. No.The amnion of mammalian embryo is derived from
1. Mesoderm and trophoblast
2. Endoderm and mesoderm
3. Ectoderm and mesoderm
4. Ectoderm and endoderm
1. Mesoderm and trophoblast
2. Endoderm and mesoderm
3. Ectoderm and mesoderm
4. Ectoderm and endoderm
Hormones secreted by the placenta to maintain pregnancy are
1. hCG,hPL, progestogens, estrogens
2. hCG, hPL, estrogen, relaxin, oxytocin
3. hCG, hPL, progestogens, prolactin
4. hCG, progestogens, estrogens, glucocorticoids
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The difference between spermiogenesis and spermiation is:
| 1. | In spermiogenesis, spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation, spermatozoa are formed. |
| 2. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatids are formed. |
| 3. | In spermiogenesis, spermatids are formed, while in spermiation, spermatozoa are formed. |
| 4. | In spermiogenesis, spermatozoa are formed, while in spermiation, spermatozoa are released from sertoli cells into the cavity of seminiferous tubules. |
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Match the items given in Column I with those in Column II and select the correct option given below:
| Column I | Column II | ||
| (a) | Proliferative Phase | (i) | Breakdown of the endometrial lining |
| (b) | Secretory Phase | (ii) | Follicular Phase |
| (c) | Menstruation | (iii) | Luteal Phase |
| (a) | (b) | (c) | |
| 1. | (ii) | (iii) | (i) |
| 2. | (i) | (iii) | (ii) |
| 3. | (iii) | (ii) | (i) |
| 4. | (iii) | (i) | (ii) |
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For normal fertility, what percent of the sperm in ejaculate must exhibit vigorous motility?
| 1. | 20 | 2. | 30 |
| 3. | 40 | 4. | 60 |
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Transfer of sperms into the female genital tract is called:
| 1. | Insemination | 2. | Emission |
| 3. | Ejaculation | 4. | Spermiation |
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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