What happens during fertilization when many sperms reach close to ovum ....
Cells of corona radiata trap all the sperm except one
Only two sperms nearest to ovum penetrate zona pellucida
Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
All sperms except the one nearest to ovum lose their tails
Correct Answer :
C. Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
Related Questions
What is Hirsuitism in females? (Usually with Poly cystic ovarian disease)
Unusually tall
Abnormal growth of facial and body hair
Abnormal voice
Short stature
Prostate gland produces a secretion for ...
Attracting sperms
Stimulating sperm activity
Inhibiting sperm activity
None of the above
Human placenta is
Endothelial
Haemochorial
Epitheliochorial
Syndesmochorial
In infertility treatment the ovum is fertilized outside the body and injected into the uterus
Gamete intra fallopian transfer
Invitro fertilization
Intra uterine insemination
Zygote intra fallopian transfer
The middle piece of the sperm contains
Protein
Nucleus
Mitochondria
Centriole
Third phase of embryo development is ...
Cleavage
Fertilization
Gametogenesis
Gastrulation
Acrosome of sperm contains ...
Hyaluronidase and acrosin
Hyaluronic acid and acrosin
Hippuric acid and uric acid
Testosterone
What is the best sperm extraction technique for men with obstructive azoospermia?
TESE - Microsurgical testicular sperm extraction
Percutaneous Epididymal Sperm Aspiration (PESA)
Intra cytoplasmic sperm injection ( ICSI)
Fine needle aspiration
The embryonic stage that resembles a mulberry fruit is
Nerula
Gastrula
Morula
Blastula
Pregnancy can be detected as early as on
28 th day of cycle
8th week
40 th day of the cycle
10 th week
A marriage between man with normal vision and colour blind woman will give birth to
Colour blind sons and 50% carrier daughter
50% colourblind sons and 50% carrier daughter
Normal males and carrier daughters
Colour blind sons and carrier daughters.
In human embryo, the digestive system develops from the
Epithelium
Mesoderm
Endoderm
Ectoderm
The three primary germ layers, ectoderm, endoderm and mesoderm are differentiated during
Blastulation
Neurulation
Gastrulation
Organogenesis
HCG, HPL and relaxin are produced in women ...
At puberty
During pregnancy
Before puberty
At menopause
Level of estrogen and progesterone are minimum at the time of
Follicular phase
Ovulation
Secretory phase
Onset of menstrual phase
The rate of active movement of sperm is ...
1.5 -3.0 mm/min
1.5 - 3.0 cm/min
1.5 -3.0 m/min
1.5 -3.0 m/hr
Fimbriae of fallopian tube ...
Release ovum from graffian follicle
Cause endometrial changes for implantation
Help develop corpus luteum
Help collection of ovum after ovulation
Cu ions released from copper-releasing intra uterine devices (iuds)
Prevent ovulation
Suppress sperm motility
Prevents implantation of embryo
Kills sperms
Name the pituitary hormone that regulates sertoli cells
Prolactin
LH
FSH
Oxytocin
Embryo at 16-celled stage is called ...
Morula
Blastula
Blastomere
Gastrula
Haemophilic man marries a normal woman. Their off springs will be
All haemophilic
All boys haemophilic
All girls haemophilic
All normal
The male hormone testosterone is secreted by
Sertoli cells
Leydig cells
Crypt cells
Semniferous tubules
Chorionic gonadotropin is secreted by ...
Pituitary
Ovary
Placenta
Uterus
Pregnancy test is confirmed by the presence of
Prolactin in urine
Relaxin in urine
H c g in urine
Fsh and lh in urine
Menstrual phase is followed by .
Luteal phase
Follicular phase
Fertilization
Implantation
Immediately after ovulation, the ovum is covered by a membrane called
Chorion
Zona pellucida
Corona radiata
Vitelline membrane
Part of fallopian tube closest to ovary is
Infundibulum
Cervix
Ampulla
Isthmus
Corona radiata is held by...
Mucopolysaccharide
Oligosaccharide
Lipopolysaccharide
Lipoprotein
A genetically diseased father (male) marries with a normal female and gives birth to 3 carrier girls and 5 normal sons. Find out the type of genetic disease.
Sex-influenced disease
Blood group inheritance disease
Sex-linked disease
Sex-recessive disease
The first milk which comes out just after child birth is known as .
Colostrum
Prolactin
Hind milk
Lactogen