17795.Which one of the following events is correctly matched with the time period of the normal menstrual cycle?
Release of ovum – 5th day
Endometrium regenerates – 5 – 10 days
Endometrium secretes nutrients for implantation – 11 – 18 days
Rise in progesterone level – 1 – 15 days
17796.Which one is unpaired gland in male reproductive system
Seminal vesicle
Cowper's gland
Prostate gland
Lacrimal gland
17797.Spermatogonia undergo a growth phase to become
spermatozoa
Primary spermatocyte
Secondary spermatocyte
Spermatid
17798..
Which one is initiated by secretion of trophoblast?
Which one is initiated by secretion of trophoblast?
Blastulation
Cleavage
Gastrulation
Implantation
17799.Which one is incorrect about menstruation?
At menopause, there is abrupt increase in gonadotrophic hormones
Beginning of cycles of menstruation is called menarche
During normal menstruation about 40 ml of blood is lost
The menstrual fluid can easily clot
17800.Which one holds corona radiata?
Mucopolysaccharide
Oligosaccharide
Lipopolysaccharide
Lipoprotein
17801.Which one functions as endocrine gland after ovulation?
Stroma
Vitelline Membrane
Germinal epithelium
Graafian follicle
17802.The chemical substance released by activated spermatozoa that acts on the ground substances of the follicle cells is known as
Progesterone
Hyaluronidase
Relaxin
Gonadotropin
17803.Which of the following is ectodermal?
Muscular tissue
Epithelial tissue
Nervous tissue
Connective tissue
17805.Which of the following hormones prepares endometrium for embryo implantation?
LH
Progesterone
FSH
Testosterone
17806.Which is incorrect?
Menstruation lasts 4 days
Menstrual cycle takes 28 days
Menopause occurs at 45 – 55 years
Ovulated egg released during pregnancy die
17808.Which hormone is responsible for the rupture of follicle and initiating the formation of corpus luteum?
follicle stimulating hormone
luteotropin
luteinizing hormone
all of the above
17809.Which cells of the testis provide nourishment to spermatozoa?
Sertoli cells
Leydig cells
Interstital cells
Spermatogonia
17810.When egg is not fertilized, yellow coloured corpus luteum degenerates to form
Corpus albicans
Corpus callosum
Corpus striatum
Corpora quadrigemina
17811.What is true about cleavage in fertilized egg of humans?
Meroblastic
Starts when egg reaches uterus
starts in fallopian tube
It is identical to normal mitosis
17812.Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?
Retention of well-developed corpus luteum
Fertilisation of the ovum
Maintenance of the hypertrophical endometrial lining
Maintenance of high concentration of sex-hormones in the blood stream
17814.Which of the following structures are derivatives of the endoderm?
Skin and nerve cord
Alimentary canal and respiratory structures
Muscles and blood
Excretory and reproductive structures
17815.What is false?
Menarche is beginning of menstruation
Menstruation is shedding of endometrial lining
Menopause occurs in the beginning of puberty
Ovulation occurs under high tire of LH
17816.Various parts of male urethra are
Prostatic, bulbourethra and ejaculatory
Prostatic, membranous and penile
Corpora cavernosa and corpus spongiosum
Prostatic, bulbourethal and glans
17817.Types of asexual reproduction found in hydra is
Sporulation
Gemmule formation
Bianry fission
Budding
17818.Type of cleavage that occurs in human zygote
Holoblastic and equal
Holoblastic and unequal
Meroblastic
Meroblastic and superficial
17819.Twins joined in various regions are
Fraternal twins
Identical twins
Siamese twins
non-identical twins
17820.Thick layer which immediately surrounds the ovum is
Zona pellucida
Membrana granulosa
Corona radiata
vitelline membrane
17821.The shortest phase in menstrual cycle is
Menstrual phase
Secretory phase
Ovulatory phase
Proliferative phase
17825.The internal cavity commonly formed by cell division prior to gastrulation is
Enteron
Blastopore
Blastocoel
Coelom
17826.The role of sertoli cells in spermatogenesis is
they direct morphogenesis of sperms
they provide nutrition to developing sperms
both a and b
they stimulate germinal epithelium
17827.Notochord, skeletal system and dermis of skin are derivatives of
all the three germinal layers
mesoderm
Endoderm
Ectoderm
17828.The role of Leydig cells is
Nourishment of sperms
Give motility to sperms
Synthesize testosterone hormone
Undergo spermatogenesis
17829.The path, where male nucleus fuses with female pronucleus, is known as
Fertilization path
Penetration path
Copulation path
none of the above
17830.The morula is formed during cleavage after
2 days of fertilization
at the end of third day of fertilization
4 days after fertilization
7 days of fertilization
17831.The membrane which holds ovary in position is called
mesorchium
mesovarium
parietal peritoneum
mesosalpinx
17834.The head of mature mammalian sperm is made of
An acrosome
Elongated nucleus covered by acrosome
Two centrioles and an aial filament
Nucleus, acrosome, cytoplasm and mitochondrial sheath
17835.The gravid phase of uterus is
proliferative phase
ovulatory phase
secretary phase
none of the above
17836.The first germ layer formed in the embryo is
Ectoderm
Endoderm
Mesoderm
Extra embryonal mesoderm
17840.Sperms produce an enzymatic substance for dissolving egg coverings. It is called
Hyaluronic acid
Hyaluronidase
Androgamone
Diastase
17841.Spermiogenesis changes
Spermatogonium to primary spermatocyte
Primary spermatocyte to secondary spermatocyte
Secondary spermatocyte to spermatid
Spermatid to sperm
17842.Spermatozoa are nourished during their development by
Sertoli cells
Interstitial cells
Connective tissue cells
None of the above
17844.Sperm of animal species a cannot fertilise ovum of species b because
Fertilizins of a and b are not compatible
Antifertilizins of a and b are not compatible
Fertilizin of a and antifertilizin of b are not compatibel
Antifertilizin of a and fertilizing of b are not compatibel