The part of fallopian tube closest to the ovary is infundibulum. Infundibulum possess finger-like projections called fimbriae that help in collection of ovum after ovulation. It leads to wider part of oviduct called ampulla. The last part of oviduct is isthmus that has a narrow lumen and joins the uterus.

Correct Option: B

The part of fallopian tube closest to the ovary is infundibulum. Infundibulum possess finger-like projections called fimbriae that help in collection of ovum after ovulation. It leads to wider part of oviduct called ampulla. The last part of oviduct is isthmus that has a narrow lumen and joins the uterus.

Parturition is the process of delivery of the foetus. The signals for parturition originate from the fully developed foetus and placenta that induce uterine contraction called foetal ejection reflex. This triggers the release of oxytocin hormone from pituitary. This in turn leads to expulsion of the baby out of uterus.

Correct Option: B

Parturition is the process of delivery of the foetus. The signals for parturition originate from the fully developed foetus and placenta that induce uterine contraction called foetal ejection reflex. This triggers the release of oxytocin hormone from pituitary. This in turn leads to expulsion of the baby out of uterus.

Eggs are of 4 types regarding the amount of yolk present in them:
(i) Alecithal Egg: Almost free of yolk eg. most mammals like man.
(ii) Microlecithal Egg: Very small amount of yolk eg. Branchiostoma.
(iii) Mesolecithal Egg: Moderate amount of yolk eg. Frog’s egg
(iv) Macrolecithal Egg: Large amount of yolk eg. Reptiles, birds and egg-laying mammals.

Correct Option: A

Eggs are of 4 types regarding the amount of yolk present in them:
(i) Alecithal Egg: Almost free of yolk eg. most mammals like man.
(ii) Microlecithal Egg: Very small amount of yolk eg. Branchiostoma.
(iii) Mesolecithal Egg: Moderate amount of yolk eg. Frog’s egg
(iv) Macrolecithal Egg: Large amount of yolk eg. Reptiles, birds and egg-laying mammals.

Egg is liberated from the ovary (ovulation) at secondary oocyte stage when the meiosis II is arrested in secondary oocyte. It will be induced by the sperm.

Correct Option: A

Egg is liberated from the ovary (ovulation) at secondary oocyte stage when the meiosis II is arrested in secondary oocyte. It will be induced by the sperm.

The role of prolactin is not concerned with initiation of parturition in humans. Prolactin is responsible for milk synthesis in mammary glands. When the levels of estrogen and progesterone become low at parturition, then anterior pituitary activates to release prolactin.

Correct Option: C

The role of prolactin is not concerned with initiation of parturition in humans. Prolactin is responsible for milk synthesis in mammary glands. When the levels of estrogen and progesterone become low at parturition, then anterior pituitary activates to release prolactin.