Human Reproduction

Changes in GnRH pulse frequency in females is controlled by circulating levels of

1. progesterone only
2. progesterone and inhibin
3. estrogen and progesterone
4. estrogen and inhibin.

Fertilisation in humans is practically feasible only if

1. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
2. the sperms are transported into cervix within 48 hrs of release of ovum in uterus
3. the sperms are transported into vagina just after the release of ovum in Fallopian tube
4. the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the Fallopian tube.

Select the incorrect statement.

1. LH and FSH decrease gradually during the follicular phase.
2. LH triggers secretion of androgen from the Leydig cells.
3. FSH stimulates the Sertoli cells which help in spermiogenesis.
4. LH triggers ovulation in ovary.

Identify the correct statement on 'inhibin'.

1. Is produced by granulosa cells in ovary and inhibits the secretion of LH
2. Is produced by nurse cells in testes and inhibits the secretion of LH
3. Inhibits the secretion of LH, FSH and prolactin
4. Is produced by granulosa cells in ovary and inhibits the secretion of FSH

Which of the following depicts the correct pathway of transport of sperms?

1. Rete testis Efferent ductules Epididymis Vas deferens
2. Rete testis Epididymis Efferent ductules Vas deferens
3. Rete testis Vas deferens Efferent ductules Epididymis
4. Efferent ductules Rete testis Vas deferens Epididymis

Match column I with column II and select the correct option using the codes given below.

1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
2. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
3. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
4. (a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)

Several hormones like hCG, hPL, estrogen, progesterone are produced by

1. ovary
2. placenta
3. Fallopian tube
4. pituitary.

In human females, meiosis-II is not completed until

1. uterine implantation
2. birth
3. puberty
4. fertilisation

Which of the following layers in an antral follicle is acellular?

1. Stroma
2. Zona pellucida
3. Granulosa
4. Theca interna

Which of the following events is not associated with ovulation in human life?

1. Release of secondary oocyte
2. LH surge
3. Decrease in estradiol
4. Full development of Graafian follicle