Human Reproduction

Extrusion of second polar body from egg nucleus occurs :

1. Before entry of sperm into ovum
2. Simultaneously with first cleavage
3. After entry of sperm but before fertilization
4. After fertilization

Select the correct sequence for transport of sperm cells in male reproductive system :

1. Seminiferous tubules Vasa efferentia Epididymis Inguinal canal Urethra
2. Testis Epididymis Vasa efferentia Vas deferens Ejaculatory duct Inguinal canal Urethra Urethral meatus
3. Testis Epididymis Vasa efferentia Rete testis Inguinal canal Urethra
4. Seminiferous tubules Rete testis Vasa efferentia Epididymis Vas deferens Ejaculatory duct Urethra Urethral meatus

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.