Human physiology ( Fertilization- parturition)

Fertilization can occur if-

• a.) Ova reaches ampulla first then sperm reach to ampulla

• b.) Sperm reach ampulla first and then ova reaches ampulla

• c.) Ova and sperm both reach at same time

• d.) Both a and c

Polyspermy is prevented -

• a.) As the sperm touches Corona radiata cells

• b.) As sperm reaches Zona pellucida

• c.) As sperm reaches Plasma membrane

• Both b and c

Meiotic division of secondary oocyte is induced by secretion of-

• a.) Sperm acrosome into Zona pellucida

• b.) Sperm acrosome into plasma membrane

• c.) Sperm acrosome into egg cytoplasm

• d.) All of the above

The haploid ovum resulted after completion of second reduction division is called as -

• Secondary oocyte

• Ovum

• Ootid

• Female gamete

Number of chromosome of first and second polar body formed after successive division in oogonia of females are respectively -

• 46, 23

• 23, 46

• 23, 23

• 46, 46

Zygote consisting of 4 blastomeres could be found in

• a.) Ampulla

• b.) Isthmus

• c.) Uterus

• d.) Both a and b

Mitotic division of zygote starts when it moves ___(a)___ towards __(b)__ respectively.

• a.) ampulla, uterus

• b.) Ampulla, isthmus

• c.) Isthmus, Uterus

• d.) Both b and c

Morula consists of _____ blastomeres.

• 04-16

• 2-8

• 8-15

• 8-16

The blastomeres of developing embryo has started developing Outer and inner layers. This stage is called -

• a.) Blastocyst

• b.) Morula

• c.) Trophoblast

• Both a and c

Chronic villi is part of -

• a.) Placenta only

• b.) Foetus only

• c.) Uterine tissue only

• Both a and b