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Human Reproduction Mcq
Quiz 7
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Q.1
Common duct formed by union of vas deferens and duct from seminal vesicle is .... ....
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a) Urethra
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b) Tunica vasculosa
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c) Ejaculatory duct
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d) Spermatic duct
Explanation
Each ejaculatory duct is formed by the union of the vas deferens with the duct of the seminal vesicle. They pass through the prostate, and open into the urethra at the seminal colliculus. During ejaculation, semen passes through the prostate gland, enters the urethra and exits the body via the urinary meatus. Answer : (c)
Q.2
Time for conception chance in women starting from day of menstruation ... ... [ KCET 2012 ]
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a) 4th day
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b) 14th day
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c) 26 day
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d) 1st day
Explanation
Answer : (b)
Q.3
What is true of cleavage? ... ... [ MPPMT 1989 ]
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a) Daughter cells or blastomeres grow in size equal to parent cell
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b) blastomeres separate
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c) Cytoplasm of blastomeres increases after each division
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d) There is no growth of daughter cells
Explanation
There is no growth of daughter cells during Cleavage Answer : (d)
Q.4
Which one is the safest method of birth control ... ... [ KCET 2006 ]
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a) Termination of non wanted pregnancy
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b) Sterilization techniques
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c) The rhythm method
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d) Use of physical barriers
Explanation
Sterilization is a procedure that closes or blocks your fallopian tubes. Sterilization is a safe form of birth control. It has a low risk of death and complications. Answer : (b)
Q.5
Fimbriae of fallopian tube ... ... [ Kerala 2011 ]
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a) Release ovum from Graafian follicle
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b) Cause endometrial changes for implantation
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c) Help develop corpus luteum
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d) Help collection of ovum after ovulation
Explanation
The sole function of fimbriae is to help transport an ovulated egg from the ovary into the fallopian tube. The fimbriae are vital to fertilization of the egg and can become damaged, leading to infertility. Answer : (d)
Q.6
Amnion is helpful to embryo in ... ... [ MPPMT 1999 ]
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a) Nutrition
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b) Protection from shock
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c) Excretion
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d) Respiration
Explanation
Amnion is helpful to embryo in protection from shock Answer : (b)
Q.7
Graafian follicle of ovary secretes ... ... [ MPPMT 1999]
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a) Estrogen
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b) Relaxin
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c) Progesterone
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d) Cortisone
Explanation
The Graafian follicle begins to form deep inside the ovary, stimulated by FSH as the oestrous cycle develops, gradually enlarging and maturing as it moves to the surface, eventually appearing like a blister on the surface, just prior to release of the oocyte (ovulation) by rupture of the wall. After ovulation the follicle becomes a corpus luteum. Progesterone is a hormone released by the corpus luteum in the ovary. Answer : (c)
Q.8
A temporary endocrine gland in humans is ... ... [ Chd CET 2012 ]
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a) Islets of Langerhans
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b) Pineal body
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c) Corpus luteum
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d) Corpus allata
Explanation
The human corpus luteum is a temporary endocrine gland that develops after ovulation from the ruptured follicle during the luteal phase. It is an important contributor of steroid hormones, particularly progesterone, and is critical for the maintenance of early pregnancy. Answer : (c)
Q.9
Clitoris is related to penis ....
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a) Analogous
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b) Homologous
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c) Nonfunctional part of females
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d) Functional equivalent in females
Explanation
The clitoris forms from the same tissues that become the glans and shaft of the penis, and this shared embryonic origin makes these two organs homologous (different versions of the same structure) Answer : (b)
Q.10
Part of fallopian tube closest to ovary is ... .. [ CBSE 2010 ]
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a) Infundibulum
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b) Cervix
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c) Ampulla
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d) Isthmus
Explanation
The part of fallopian tube closest to the ovary is infundibulum. Infundibulum possess finger-like projections called fimbriae that help in collection of ovum after ovulation. Answer : (a)
Q.11
Secondary oocyte is ... ...
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a) Haploid
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b) Diploid
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c) Polyploid
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d) None of the above
Explanation
Secondary oocyte completes second meiotic division if fertilized to form mature ovum (23 chromosomes) and polar body (23 chromosomes). Answer : (a)
Q.12
At the end of first meiotic division, male germ cell differentiates into ... ... [ CBSE 2008]
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a) Secondary spermatocyte
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b) Primary spermatocyte
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c) Spermatogonium
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d) Spermatid
Explanation
Answer : (a)
Q.13
Foetus is nourished by .. ....
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a) Blood
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b) Placenta
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c) Phagocytosis
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d) Yolk
Explanation
Answer : (b)
Q.14
Two offspring developed in the same uterus from fertilisation of two different ova are ... .... [ AFMC 2002 ]
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a) Monozygotic twins
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b) Dizygotic twins
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c) Fraternal twins
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d) Both B and C
Explanation
Answer : (d)
Q.15
In mammals, the onset of pregnancy causes ... .... [ MPPMT 1991 ]
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a) Secretion of testosterone
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b) Degeneration of ovary
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c) Inhibition of further ovulation
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d) Inhibition of fertilization
Explanation
Fraternal twins or dizygotic twins or non-identical twins are developed from separate fertilized ova which are genetically distinct and not necessarily of the same sex. They occur when two fertilized eggs are implanted in the uterus wall at the same time. Answer : (c)
Q.16
Choose the correct combination of labelling of hormonal control of female reproductive system
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a) a - GnRH, b- LTH, C - estrogen, d-uterus
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b) a - GnRH, b-ACTH, c -LH, d-uterus
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c) a - GnRH, b-LH/FSH, c -estrogen, d-uterus
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d) a-GnRH, b-TSH, c-LTH, d - uterus
Explanation
Hormone control of female reproductive system Answer : (c)
Q.17
Vagina of the female reproductive system is ... ...
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a) Primary sex organ
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b) Accessory sex organ
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c) Secondary sex organ
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d) None of the above
Explanation
The testis in the male, and the ovary in the female, are called the primary sex organs. All others are called secondary sex organs, divided between the external sex organs—the genitals or genitalia, visible at birth in both sexes—and the internal sex organs Answer : (c)
Q.18
In human the oocyte is maintained in a state of meiotic arrest by the secretion of ... ... [ AMU 2010 ]
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a) Granulosa cells
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b) Zona pellucida
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c) Cumulus oophorus
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d) Theca
Explanation
Answer : (a)
Q.19
For the formation of 32 spermatids, meiotic division occurs in cells ... ... [ Kerala 2002 ]
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a) 16
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b) 8
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c) 32
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d) 4
Explanation
From one primary spermatocyte, 4 spermatids are formed after one mitotic and 1 meiotic division. Therefore, for the formation of 32 spermatids 8 meiotic division are required. Answer : (b)
Q.20
In ectopic pregnancy, foetus grows in ... ... [ AMU 2003 ]
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a) Vagina
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b) Fallopian tube
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c) Uterus
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d) Body cavity
Explanation
Ectopic pregnancy is when a pregnancy grows outside of your uterus, usually in fallopian tube Answer : (b)
Q.21
Sperm of animal species a cannot fertilise ovum of species b because ... ... [ JKCET 2012]
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a) Fertilization of a and b are not compatible
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b) Antifertilizin of a and b are not compatible
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c) Fertilizin of a and Antifertilizin of b are not compatible
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d) Antifertilizin of a and fertilizin of b are not compatible
Explanation
Remarkable peculiarity of the fertilizins and antifertilizins is that they combine in a specific manner; that is, the egg fertilizin of a particular species reacts best with the sperm antifertilizin of the same species. Answer : (d)
Q.22
Villi of human placenta develop from .... ... [ KCET 1997 ]
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a) Chorion
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b) Allantois
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c) Yolk sac
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d) Both A and B
Explanation
In mammals (except marsupials), the chorion develops a rich supply of blood vessels and forms an intimate association with the endometrium (lining) of the female’s uterus. Chorion and endometrium together form the placenta Answer : (a)
Q.23
Luteinising hormone is ... ... [ MHTCET 2008 ]
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a) Lactotrophic
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b) Mammotropic
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c) Non-mammotropic
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d) Both A and B
Explanation
Luteinizing hormone (LH) is an important hormone both men and women produce. This hormone is known as a gonadotropin, and it affects the sex organs in both men and women. For women, it affects ovaries, and in men, it affects the testes. LH plays a role in puberty, menstruation, and fertility. It don’t have a stimulating effect on the mammary gland (non-mamotropic) Lactotrophic A protein hormone of the anterior lobe of the hypophysis that stimulates the secretion of milk and possibly, during pregnancy, breast growth. Luteinising hormone produced by gonadotropic cells. Answer : (c)
Q.24
Which is not formed by Wolffian duct? ... ... [ DPMT 2005 ]
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a) Epididymis
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b) vasa deferentia
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c) Ejaculatory duct
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d) Oviduct
Explanation
Wolffian ducts (WDs) are the embryonic structures that form the male internal genitalia.the duct of the mesonephros that persists in the female chiefly as part of a vestigial organ and in the male as the duct system leaving the testis and including the epididymis, vas deferens, seminal vesicle, and ejaculatory duct Answer : (d)
Q.25
Testes descend into scrotum in mammals for .... ... [ AFMC 2001 ]
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a) Spermatogenesis
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b) Fertilization
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c) Development of sex organs
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d) Development of visceral organs
Explanation
Scrotum lies outside the abdominal cavity. So, the temperature in scrotum is 2-3 degree less than the body temperature. And this temperature is required for the testis to produce sperms. So, that is why the testis descends into the scrotum. Sperms can only be produced (Spermatogenesis) when testis is descended in the scrotum. Answer : (a)
Q.26
Sertoli cells are called ... ... [ JIPMER 2004 ]
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a) Secretory cells
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b) Respiratory cells
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c) Excretory cells
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d) Nurse cells
Explanation
A Sertoli cell is a "nurse" cell of the testicles that is part of a seminiferous tubule and helps in the process of spermatogenesis, the production of sperm. Answer : (d)
Q.27
Glands secreting male sex hormone are ... ... [ Pb PMT 2000 ]
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a) Leydig cells
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b) Seminiferous tubules
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c) Vasa deferentia
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d) Testes
Explanation
Although the main sources of sex hormones are the testes in male and ovaries in female, there are similar hormones that secreted from the adrenal gland cortex such as the male sex hormone testosterone and female sex hormones oestrogen and progesterone. Answer : (d)
Q.28
Which is devoid of glands ... .. [ DPMT 2011 ]
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a) Uterus
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b) Vulva
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c) Vagina
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d) Oviduct
Explanation
oviduct is a simple ciliated tube, lined with mucus-secreting glands that produce the jelly that surrounds the ovum. Uterine glands or endometrial glands are tubular glands, lined by ciliated columnar epithelium, found in the functional layer of the endometrium that lines the uterus. The vulva consists of the external female sex organs. The vulva includes the mons pubis (or mons veneris), labia majora, labia minora, clitoris, vestibular bulbs, There are two types of vestibular glands, both are structures found near and in the vagina : the greater, or major, vestibular glands are also known as Bartholin's glands; the lesser, or minor vestibular glands also known as Skene's glands. The Bartholin's (BAHR-toe-linz) glands are located on each side of the vaginal opening. These glands secrete fluid that helps lubricate the vagina. Vagina is devoid of gland because it is lower most part of cervix and help as birth canal only. Answer : (c)
Q.29
Chorionic gonadotropin is secreted by ... ... [ MHT CET 2011 ]
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a) Pituitary
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b) Ovary
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c) Placenta
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d) Uterus
Explanation
Human chorionic gonadotropin (hCG) is a hormone produced by cells that are surrounding a growing embryo (syncitiotrophoblast initially), which eventually forms the placenta after implantation Answer : (c)
Q.30
Which is not correct about placenta... ...
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a) it prevents passage of maternal IgG to foetus
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b) It acts as foetal lung
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c) It acts as foetal liver
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d) It acts as endocrine gland
Explanation
Placental transfer of maternal IgG antibodies to the fetus is an important mechanism that provides protection to the infant while his/her humoral response is inefficient. Answer : (a)
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