All of the following structures are derived from mesoderm except the ____.

  • pancreas

  • dermis of skin

  • notochord

  • heart

Sperm have several components; the function of the acrosome is to:

  • Produce base to neutralize the acidic environment of the female reproductive system

  • Propel the sperm as they swim through the fluid of the female reproductive tract

  • Release an enzyme that breaks down the membrane of the ovum

  • Metabolise the sugars provided by the semen for energy

At what point does the secondary oocyte complete meiosis?

  • when acrosomal enzymes begin to break down the egg's jelly coat

  • when the luteinizing hormone triggers ovulation

  • 3 after it is penetrated by a sperm cell

  • when the secondary oocyte implants in the endometrium of the uterus

How do ovulated oocytes get into the uterus?

  • Because ovaries are within the uterus, the ovulated egg is already within the uterus.

  • Cilia within an oviduct create currents that sweep the egg toward the uterus.

  • The oocyte actively swims through the oviduct, using its flagellum.

  • Fimbriae sweep over the oviduct.

Which of the following hormones is not secreted by the human placenta?

  • HCG

  • HGH

  • HPL

  • Progesterone

Which of the following is secreted only during the luteal phase of a menstrual cycle ?

  • LH

  • FSH

  • Estrogen

  • Progesterone

Which of these structures contributes the greatest percentage to semen ?

  • Bulbourethral glands

  • Prostate

  • Seminal vesicles

  • Testes

Which event is incorrectly matched with the time of its occurence [with respect to a 28 days menstrual cycle] ?

  • Beginning of the menstrual flow - Day 1

  • Ovulation - Day 14

  • Beginning of the proliferative phase - Day 5

  • Peak  secretion of estrogen - Day 22

Which human male accessory reproductive duct receives a duct from the seminal vesicle?

  • Rete testis

  • Vas deferens

  • Epididymis

  • Urethra

The primary oocyte completes its first meiotic division within the:

  • Primary follicle

  • Secondary follicle

  • Tertiary follicle

  • Graafian follicle

The human fetus develops limbs and digits:

  • After one month of pregnancy

  • By the end of second month of pregnancy

  • During the fifth month of pregnancy

  • By the end of second trimester of pregnancy

In the male human being, sperms contain autosomes and

  • Only one Y-chromosome

  • Only one X-chromosome

  • Both X and Y-chromosome

  • Either X or Y-chromosome

Which of the following hormones acts on the Sertoli cells to stimulate secretion of some factors which help in the process of spermiogenesis?

  • FSH

  • LH

  • Testosterone

  • GnRH

The developing oocyte divides and releases the first polar body in :

  • Primary follicle

  • Secondary follicle

  • Tertiary follicle

  • Graffian follicle

During parturition, the fetal ejection reflex triggers the release of:

  • An increasing amount of estrogen and a decreasing amount of progesterone from the placenta

  • A decreasing amount of estrogen and an increasing amount of progesterone from the placenta

  • Oxytocin in from the maternal pituitary

  • GnRH from the fetal hypothalamus

Mature sperms in humans are stored in:

  • Seminal vesicles

  • Epididymis

  • Vas deferens

  • Rete testis

Menstruation is triggered by an abrupt decline in the amount of:

  • Estrogen

  • Progesterone

  • LH

  • FSH

Capacitation occurs in

  • rete testis

  • epididymis

  • vas deferens

  • female reproductive tract

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

  • Rete testis →Efferent ductules → Epididymis → vas deferens

  • Rete testis → Epididymis → Efferent ductules → vas deference

  • Rete testis → Vas deference → Efferent ductules → Epididymis

  • Efferent ductules →Rete testis → Vas deference →Epididymis

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

    Column 1                             Column II

A. Mons pubis                  1. Embryo formation

B. Antrum                        2. Sperm

C. Trophectoderm            3. Female external genitalia 

D. Nebenkern                   4. Graafian follicle

Codes

      A      B     C       D

 

  • ()  3      4     2       1

  • ()  3      4     1       2

  • ()  3      1     4       2

  • ()  1      4     3       2

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

  • ovary

  • placenta

  • Fallopian tube

  • pituitary

Identify the correct statement on ‘inhibin'

  • Is produced by granulosa cells in ovary and inhibits the secretion of FSH

  • Is produced by granulosa cells in ovary and inhibits the secretion of LH

  • Is produced by nurse cells in testes and inhibits the secretion of LH

  • Inhibits the secretion of LH, FSH and prolactin

Select the incorrect statement

  • LH and FSH triggers ovulation in ovary

  • LH and FSH decrease gradually during the follicular phase

  • LH triggers secretion of androgens from the Leydig cells

  • FSH stimulates the Sertoli cells which help in spermiogenesis

Fertilisation in humans is practically feasible only if

  • the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube

  • the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix
  • the sperms are transported into cervix within 48 hrs of release of ovum in uterus
  • the sperms are transported into vagina just after the release of ovum in fallopian tube

Ectopic pregnancies are referred to as

  • pregnancies with genetic abnormality

  • implantation of embryo at site other than uterus

  • implantation of defective embryo in the uterus

  • pregnancies terminated due to the hormonal imbalance

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

 

  • Decrease in oestradiol

  • Full development of Graafian follicle

  • Release of secondary oocyte

  • LH surge

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

  • Granulosa

  • Theca interna

  • Stroma

  • Zona pellucida

In human females, meiosis-II is not completed until 

  • Puberty

  • fertilization 

  • Uterine implantation 

  • birth 

Which of the following cells during gametogenesis is normally diploid?

  • Primary polar body

  • Spermatid

  • Spermatogonia

  • Secondary polar body

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

  • Urethra

  • Ureter

  • Vas deferens

  • Vasa efferentia

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Practice Zoology Quiz Questions and Answers