Human Reproduction

Hormones secreted by the placenta to maintain pregnancy are

1. hCG, hPL, progestogens, prolactin
2. hCG, hPL, estrogens, relaxin, oxytocin
3. hCG, hPL, progestogens, estrogens
4. hCG, progestogens, estrogens, glucocorticoids

The difference between spermiogenesis and spermiation is

1. in spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed
2. in spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed
3. in spermiogenesis spermatozoa from Sertoli cells are released into the cavity of seminiferous tubules, 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

The amnion of mammalian embryo is derived from

1. ectoderm and mesoderm
2. endoderm and mesoderm
3. mesoderm and trophoblast
4. ectoderm and endoderm

Match the items given in column I with those in column II and select the correct option given below.

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

A temporary endocrine gland in the human body is

1. corpus cardiacum
2. corpus luteum
3. corpus allatum
4. pineal gland.

Capacitation occurs in

1. epididymis
2. vas deferens
3. female reproductive tract
4. rete testis

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