Human Reproduction · Question 72

What happens during fertilization in humans after many sperms reach close to the ovum?

1. Only two sperms nearest the ovum penetrate zona pellucida
2. Secretions of acrosome help one sperm enter cytoplasm of ovum through zona pellucida
3. All sperms except the one nearest to the ovum lose their tails
4. Cells of corona radiata trap all the sperms except one.

About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occur?

1. 11th day
2. 14th day
3. 20th day
4. 5th day

If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from :

1. Vagina to uterus
2. Testes to epididymis
3. Epididymis to vas deferens
4. Ovary to uterus

The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for :

1. providing a secondary sexual feature for exhibiting the male sex
2. maintaining the scrotal temperature lower than the internal body temperature
3. escaping any possible compression by the visceral organs
4. providing more space for the growth of epididymis

The figure given below depicts a diagrammatic sectional view of the female reproductive system of humans. Which one set of three parts out of I-VI have been correctly identified? [Figure]

1. (I) Perimetrium, (II) Myometrium, (III) Fallopian tube
2. (II) Endometrium, (III) Infundibulum, (IV) Fimbriae
3. (III) Infundibulum, (IV) Fimbriae, (V) Cervix
4. (IV) Oviducal funnel, (V) Uterus, (VI) Cervix

Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of

1. Oxytocin from maternal pituitary
2. Oxytocin from foetal pituitary
3. Relaxin from placenta
4. Estrogen from placenta

In human female the blastocyst

1. gets implanted into uterus 3 days after ovulation
2. gets nutrition from uterine endometrial secretion only after implantation
3. gets implanted in endometrium by the trophoblast cells
4. forms placenta even before implantation

Secretions from which one of the following are rich in fructose, calcium and some enzymes?

1. Liver
2. Pancreas
3. Salivary glands
4. Male accessory glands

Sertoli cells are found in :

1. ovaries and secrete progesterone
2. adrenal cortex and secrete adrenaline
3. seminiferous tubules and provide nutrition to germ cells
4. pancreas and secrete cholecystokinin

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