The human sperm was first seen and described by
Hamm and Leeuwenhock
Spallazani
De Graff
VonBaer
Correct Answer :
A. Hamm and Leeuwenhock
Related Questions
The placental barrier between animal and foetal blood is minimum
goat
cow
pig
man
The structure formed after release of ova from Graffian follicles and secretory in nature, is
corpus callosum
corpus luteum
corpus albicans
corpus striatum
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
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
A woman's fertility ceases at about 49-55 years. This is known as
gestation
menstruation
puberty
menopause
Secodary sexual character in man is
breast
thyroid
ovary
testis and ovaries
The hormone which shows a single mid cycle peak in the human female is
FSH
LH
oestrogen
progesterone
Amniotic fluid protects the foetus from
degeneration
encystment
jerks
none of these
Gubernaculun connects
testis to scrotum
ovary to the body wall in abdomen
the two muscles
the two bones
In the human menstrual cycle, ovulation occurs around
day 10
day 14
day 8
day 22
The testes secrete a group of hormones called
progestogens
androgens
estrogens
tropic hormones
The testis are found in the abdomen in
kangaroo
elephant
rabbit
goat
The part of reproductive system in male which neither produces hormones nor sperms is
seminal vesicles
cowper's glands
prostrate glands
all of these
Graffian follicles are characteristically found in the
ovary of mammal
ovary of frog
testis of frog
testis of mammal
In the male rabbit, the testes are located in
thoracic cavity
pericardial cavity
abdominal cavity
extra-abdominal scrotal cavity
The capsule enclosing testes of mammal is known as
tunica vasculosa
tunica albuginea
tunica vaginalis
none of these
Gestation period in man is a about
10 weeks
28 weeks
32 weeks
35 weeks
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
The process of spermatogenesis in human testis is completed in
74 days
90 days
56 days
32 days
Cryptorchidism is a condition in which testes are
surgically removed
not developed in foetus
unable to produce sperms
unable to descend into scrotal sacs
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
bartholine glands are found and associated with
female reproductive organs of cockroach
male reproductive organs of earthworm
male reproductive organs of rabbit
female reproductive organs of rabbit
The gestation period of elephant is about
11 months
10 months
15 months
22 months
The structure that attaches testis to dorsal body wall is
tunica albuginea
scrotal sac
mesorchium
gubernaculum
Fertilizers are substances emitted from
mature eggs
immature eggs
sperms
polar body
Embryo of a mammal is surrounded by
yolk
amniotfe fluid
both
none of these
The simplest type of placenta found in man is
Haemochorial
Epitheliochorial
Syndesmochorial
Haemo-endothelial
Which of the following animals are hermaphrodites?
Tapeworm
Leech
Earthworm
All of these
One of these is polyestrous
Sheep
Bitches
Cows
Goats
The female rabbit is
spontaneous ovulator
seasonal ovulator
induced ovulator
natural ovulator