Q. No.The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is:
1.
escaping any possible compression by the visceral organs
2.
providing more space for a large epididymis
3.
providing a secondary sexual feature for exhibiting the male sex
4.
maintaining the scrotal temperature lower than the internal body temperature
| 1. | escaping any possible compression by the visceral organs |
| 2. | providing more space for a large epididymis |
| 3. | providing a secondary sexual feature for exhibiting the male sex |
| 4. | maintaining the scrotal temperature lower than the internal body temperature |
Vasa efferentia are the ductules leading from:
1. Testicular lobules to rete testis
2. Rete testis to vas deferens
3. Vas deferens to epididymis
4. Epididymis to urethra
Seminal plasma in human males is rich in:
1. fructose and calcium
2. glucose and calcium
3. DNA and testosterone
4. ribose and potassium
The first movements of the foetus and the appearance of hair on its head are usually observed during which month of pregnancy?
1. Fourth month
2. Fifth month
3. Sixth month
4. Third month
The second maturation division of the mammalian ovum occurs:
| 1. | Shortly after ovulation before the ovum makes entry into the Fallopian tube |
| 2. | until 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 |
Which one of the following statements about human sperm is correct?
| 1. | The 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. | The acrosome serves as a sensory structure, leading the sperm towards the ovum. |
| 4. | The acrosome serves no particular function. |
Which one of the following statements about morula in humans is correct:
| 1. | It has 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 an uncleaved zygote |
| 3. | It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote |
| 4. | It has more cytoplasm and more DNA than an uncleaved zygote |
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 aminotic fluid
2. release of oxytocin from pituitary
3. fully developed foetus and placenta
4. differentiation of mammary glands
Which one of the following is the most likely root cause of why menstruation is not taking place in regularly cycling human female?
| 1. | Fertilization of the ovum |
| 2. | Maintenance of the hypertrophical endometrial lining |
| 3. | Maintenance of high concentration of sex-hormones in the blood stream |
| 4. | Retention of well-developed corpus luteum |
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