17896.Membrana granulose is
a layer of columnar cells around ova
corona radiata
a part of zona pellucida
multilayer of follicular cells around ova
17897.Testes descend into scrotum in mammals for
Spermatogenesis
Fertilization
Development of sex organs
Development of visceral organs
17899.Mammary glands are modification of
Sebaceous glands
Sweat glands
Meibomian glands
None of the above
17900.Location and secretion of Leydig cells are
Liver - cholesterol
Ovary - estrogen
Testis - testosterone
Pancreas - glucagon
17902.Levels of estrogen and progesterone are minimum at the time of
on set of menstrual phase
secretory phase
ovulation
follicular phase
17903.Inability of sperm to fertilize ovum is termed as
impotence
sterility
prostatomegaly
none of the above
17904.In the testis, primary germinal cells undergo mitotic divisions to produce
spermatozoa
primary spermatocyte
spermatogonia
secondary spermatocyte
17905.In telolecithal egg
yolk is present in the centre
yolk is unevenly distributed
yolk is absent
yolk is present all over the ovum
17906.In Mammals the tests occur in scrotal sacs outside the viscera because of the
Presence of urinary bladder
Presence of rectum
Long vas deferens
Requirement of low temperature for spermatogenesis
17907.Both corpus luteum and macula lutea are
found in human ovaries
a source of hormones
characterized by a yellow colour
contributory in maintaining pregnancy
17909.Vasa efferentia are the ductules leading from
Epididymis to urethra
Testicular lobules to rete testis
Rete testis to vas deferens
Vas deferens to epididymis
17911.Which one is involved in nourishing spermatozoans?
Leydig cells
Gubernaculum
Sertoli cells
Interstitial cells
17912.In humans at the end of first meiotic dividion, the male germ cells differentiate into
Spermatids
Spermatogonia
Primary spermatocytes
Secondary spermatocytes
17913.In human beings the type of cleavage is
Holoblastic and complete
Meroblastic and incomplete
Holoblastic and incomplete
Meroblastic and complete
17914.In development, nervous system (brain, spinal cord, nerve cells) is
Ectodermal
Endodermal
Ectomesodermal
Endomesodermal
17915.In a mammalian sperm, spirally arranged mitochondria around an axial filament occurs in
Middle piece
Head
End piece of tail
Principal piece of tail
17916.Important sperm lysine used for dissolving egg covering is
Diastase
Androgamone
Hyalouronic acid
Hyalourinidase
17917.Implantation occurs after
7 – 8 days of fertilization
10 days of fertilization
5 – 6 days of fertilization
12 days of fertilization
17918.If mammalian ovum fails to get fertilized, which one of the following is unlikely?
Corpus luteum will disintegrate
Progesterone secretion rapidly declines
Estrogen secretion further decreases
Primary follicle starts developing
17919.Identical twins in human beings is an example of
polymbryony
Neoteny
Paedogenesis
Parthenogenesis
17921.Human gametes differ from all other body cells as
they are without a cell wall
they are motile
they are haploid
none of the above
17922.The single layer of germinal epithelium covering the ovary is composed of
squamous cells
cuboidal cells
columnar cells
none of the above
17927.In absence of pregnancy the corpus luteum forms
corpora quadrigemina
corpus callosum
corpus albicans
crura cerebri
17928.How many layers does the muscle coat of the oviduct have?
one - longitudinal
two inner circular and outer longitudinal
three – oblique fibres in addition to the above
none of the above
17930.Graafian follicles are found in
Testic of mammal
Ovary of frog
Ovary of cockroach
Ovary of mammals
17936.Germinal epithelium o fovary has
Cuboidal cells
Columnar cells
Squamous cells
Stratified cells
17938.Conversion of spermatids into sperms is
Spermiogenesis
Ppermatogenesis
Gametogenesis
Metamorphosis
17939.First to be formed during embryonic development is
Primitive streak
Mesoderm
Ectoderm
Endoderm
17942.Fertilization of ovum occurs in
Fimbriac of oviduct
Isthmus of oviduct
Ampulla of oviduct
None of the above
17944.Fertilization is
Union of diploid spermatozoon with diploid ovum to form diploid zygote
Union of haploid sperm with haploid ovum to form haploid zygote
Union of haploid sperm with haploid ovum to form diploid zygote
Union of diploid sperm with haploid ovum to form triploid zygote