Q. No.The second maturation division of the mammalian ovum occurs:
1.
shortly after ovulation before the ovum makes an entry into the Fallopian tube
2.
after the ovum has been penetrated by a sperm
3.
until the nucleus of the sperm has fused with that of the ovum
4.
in the Graafian follicle following the first maturation division
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Which one of the following statements about human sperm is correct?
1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization
2. The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
3. Acrosome serves as a sensory structure leading the sperm towards the ovum
4. Acrosome serves no particular function
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Which one of the following statements about morula in humans is correct?
| 1. | It has an almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA |
| 2. | It has far less cytoplasm as well as less DNA than in an uncleaved zygote |
| 3. | It has a more or less equal quantity of cytoplasm and DNA as in an uncleaved zygote |
| 4. | It has more cytoplasm and more DNA than an uncleaved zygote |
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The part of the fallopian tube closest to the ovary is:
| 1. | isthmus | 2. | infundibulum |
| 3. | cervix | 4. | ampulla |
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A change in the amount of yolk and its distribution in the egg will affect
1. formation of zygote
2. pattern of cleavage
3. number of blastomeres produced
4. fertilization
Foetal ejection reflex in human female is induced by
1. pressure exerted by amniotic fluid
2. release of oxytocin from pituitary
3. fully developed foetus and placenta
4. differentiation of mammary glands
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Which one of the following is the most likely reason for the regular menstruation cycle not occurring in females?
| 1. | Fertilisation of the ovum |
| 2. | Maintenance of the hypertrophical endometrial lining |
| 3. | Maintenance of a high concentration of sex hormones in the bloodstream |
| 4. | Retention of well-developed corpus luteum |
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Seminal plasma in humans is rich in:
1. fructose, calcium and certain enzymes
2. fructose and calcium but has no enzymes
3. glucose and certain enzymes but has no calcium
4. fructose and certain enzymes but is poor in calcium
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The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
1. spermatocyte spermatogonia spermatid sperms
2. spermatogonia spermatocyte spermatid sperms
3. spermatid spermatocyte spermatogonia sperms
4. spermatogonia spermatid spermatocyte sperms
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| Column I | Column II | |
| 1. | Ovulation | LH and FSH attain peak levels and sharp fall in the secretion of progesterone |
| 2. | Proliferative phase | Rapid regeneration of myometrium and maturation of Graafian follicle |
| 3. | Development of corpus luteum | Secretory phase and increased secretion of progesterone |
| 4. | Menstruation | Breakdown of myometrium and ovum not fertilized |
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