Sustentacular cells are found in
testis of mammals
testis of Ascaris
ovary of mammals
pancreas of frog
Correct Answer :
A. testis of mammals
Related Questions
Embryo of a mammal is surrounded by
yolk
amniotfe fluid
both
none of these
The placental barrier between animal and foetal blood is minimum
goat
cow
pig
man
The simplest type of placenta found in man is
Haemochorial
Epitheliochorial
Syndesmochorial
Haemo-endothelial
Amnion helps in
respiration
excretion
nutrition
protection from shocks
The structure that attaches testis to dorsal body wall is
tunica albuginea
scrotal sac
mesorchium
gubernaculum
Cryptorchidism is a condition in which testes are
surgically removed
not developed in foetus
unable to produce sperms
unable to descend into scrotal sacs
Clitoris in mammals is
homologous to penis
analogous to penis
functional penis in female
non-functional penis in male
The gestation period of elephant is about
11 months
10 months
15 months
22 months
One of these is polyestrous
Sheep
Bitches
Cows
Goats
One of the following accessory glands in the male reproductive system produces secretions that neutralise the acidity in the urethra and in the female genital tract. This is necessary for survival of sperms. This fluid is secreted by
seminal vesicle
prostrate gland
cowper's gland
coagulating gland
The structure of the male reproductive system that corresponds to oviduct of the female system is
seminiferous tubules
epididymis
vas deferens
urethra
Failure of descending testis into the scrotum is known as
paedogenes
castration
cryptorchidism
impotency
The structure formed after release of ova from Graffian follicles and secretory in nature, is
corpus callosum
corpus luteum
corpus albicans
corpus striatum
The human sperm was first seen and described by
Hamm and Leeuwenhock
Spallazani
De Graff
VonBaer
After a sperm has entered an ovum in the process of fertilization, entry of further sperms is prevented by
development of the vitelline membrane
development of the pigment coat
condensation of yolk
formation of fertilization membrane
Those person in which testes does not descend into scrotal sac
show normal secondary sexual characters as the Leydig cells are unaffected
are normal in every respect except that they lack ability to procreate
the testes are comparatively smaller in size
all of these
In which of the animals, the fertilization occurs externally in water ?
Hydra
Earthworm
Frog
Cockroach
The site of fertilization in the female mammalian reproductive system is
vagina
uterus
fallopian tube
ovarian fimbriae
Sertoli cells are located in
caput epididymis
cauda epididymis
seminiferous tubules
germinal epithelium
Gubernaculun connects
testis to scrotum
ovary to the body wall in abdomen
the two muscles
the two bones
Allantois of the mammalian embryo helps in
respiration
excretion
protection
nutrition
Which of the following animals are hermaphrodites?
Tapeworm
Leech
Earthworm
All of these
Rupturing of follicles and discharge of ova is known as
copulation
ovulation
oviposition
conjugation
In the testis of rabbit, the hormone secreting cells are
spermatogonia
spermatocytes
sustentacular cells
cells of Leydig
Cells of Sertoli are found in
testis of rabbit
testis of cockroach
testis of frog
liver of mammals
In the human menstrual cycle, ovulation occurs around
day 10
day 14
day 8
day 22
The seminal vesicle in rabbit is found at the junction of
prostrate and Cowper's glands
porstrate and vasa deferens
prostrate and urethra
vasa deferens and testis
The process of spermatogenesis in human testis is completed in
74 days
90 days
56 days
32 days
The gestation period of rabbit is
28 - 32 days
60 - 70 days
20 - 25 days
80 - 90 days
The sperm count increases
if a person takes hot bath at 43 - 45°C for 30 minutes per day
if a person wears althletic supporters
during summer months
during winter months