Human Reproduction

Which of these is not an important component of initiation of parturition in humans?

1. Release of Prolactin
2. Increase in estrogen and progesterone ratio
3. Synthesis of prostaglandins
4. Release of Oxytocin

Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?

1. Uterus
2. Graafian follicle
3. Corpus luteum
4. Foetus

Meiotic division of the secondary oocyte is completed

1. At the time of fusion of a sperm with an ovum
2. At the time of copulation
3. Prior to ovulation
4. After zygote formation

Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?

1. Low concentration of FSH
2. High concentration of Progesterone
3. Low concentration of LH
4. High concentration of Estrogen

Match the following columns and select the correct option.

1. (A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
2. (A)-(i), (B)-(iv), (C)-(ii), (D)-(iii)
3. (A)-(iv), (B)-(iii), (C)-(i), (D)-(ii)
4. (A)-(iii), (B)-(ii), (C)-(iv), (D)-(i)

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.

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

Ectopic pregnancies are referred to as

1. implantation of defective embryo in the uterus
2. pregnancies terminated due to hormonal imbalance
3. pregnancies with genetic abnormality
4. implantation of embryo at site other than uterus.

Which of the following cells during gametogenesis is normally diploid?

1. Spermatogonia
2. Secondary polar body
3. Primary polar body
4. Spermatid

Capacitation refers to changes in the

1. ovum after fertilisation
2. sperm after fertilisation
3. sperm before fertilisation
4. ovum before fertilisation

Hysterectomy is surgical removal of

1. vas deferens
2. mammary glands
3. uterus
4. prostate gland

Which of these is not an important component of initiation of parturition in humans?

1. Release of oxytocin
2. Release of prolactin
3. Increase in estrogen and progesterone ratio
4. Synthesis of prostaglandins

The shared terminal duct of the reproductive and urinary system in the human male is

1. urethra
2. ureter
3. vas deferens
4. vasa efferentia

The main function of mammalian corpus luteum is to produce

1. estrogen only
2. progesterone
3. human chorionic gonadotropin
4. relaxin only