The second maturation division of the mammalian ovum occurs
shortly after ovulation before the ovum makes entry into the fallopian tube
until after the ovum has penetrated by a sperm
until the nucleus of the sperm has fused with that of the ovum
until the nucleus of the sperm has fused with that of the ovum
B.
until after the ovum has penetrated by a sperm
In mammalian ovum during maturation phase, meiosis occurs, nucleus shifts towards the animal pole and undergoes meiosis-I. After fertilisation (penetration of sperm), the second meiotic division is completed with unequal cytoplasmic cleavage. This forms a large cell the ootid with the essentially whole of the cytoplasm and a very small cell, the second polar body.
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
Fourth month
Fifth month
Sixth month
Sixth month
Signal from fully developed foetus and placental ultimately lead to parturition which requires the release of
oestrogen fro placenta
oxytocin from maternal pituitary
oxytocin from foetal pituitary
oxytocin from foetal pituitary
Vasa efferentia are the ductules leading from
testicular lobules to rete testis
rete testis to vas deferens
vas deferens to epididymis
vas deferens to epididymis
In human female, the blastocyst
forms placenta even before implantation
gets implanted into uterus three days after ovulation
gets nutrition from uterine endometrail secreation only after implantation
gets nutrition from uterine endometrail secreation only after implantation
Secretions from which one of the following are rich in fructose, calcium and some enzymes?
Male accessory glands
Liver
Pancreas
Pancreas
Which one of the following statements about human sperm is correct?
Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation
The sperm lysis in the acrosome dissolve the egg envelope facilitating fertilization
Acrosome serves as a sensory structure leading the sperm towards the ovum
Acrosome serves as a sensory structure leading the sperm towards the ovum
Seminal plasma in human males is rich in
fructose and calcium
glucose and calcium
DNA and testosterone
DNA and testosterone
The signals for parturition originate from
placenta only
placenta as well as the fully developed foetus
oxytocin released from the maternal pituitary
oxytocin released from the maternal pituitary
