ExtraEmbryonicMembrane_MCQ_BasicLevel

Extra Embryonic Membrane - Basic

Dear Readers,

An extraembryonic membrane is one of the membranes which assist in the development of the embryo. Such membranes occur in a range of animals from humans to insects. They originate from the embryo, but are not considered part of it. They typically perform roles in nutrition, gas exchange, and waste removal.

Q1. All extra embryonic membranes

•  Take part in the formation of embryo
•  Does not take part in the embryo formation
•  Form the placenta
•  Perform the function of excretion of embryo

Take part in the formation of embryo

Q2. Chorion is found

•  Inside the amnion
•  Outside the amnion
•  Inside the allantois
•  Inside the yolk sac

Inside the allantois

Q3. Middle gastrula is characterised by

•  Formation of yolk plug
•  Archenteron just beings to form
•  Blastopore and archenteron are present
•  Yolk plug shifts towards blastopore

Yolk plug shifts towards blastopore

Q4. The technique which makes use of amniotic fluid for the detection of prenatal disorders is called as

•  Endoscopy
•  Laproscopy
•  Natal endoscopy
•  Amniocentesis

Endoscopy

Q5. Function of allantois in mammals is

•  Respiration only
•  Excretion
•  Nutrition, excretion and respiration
•  Protection from shocks

Excretion

Q6. Mammalian embryo is directly surrounded by

•  Amniotic cavity
•  Allantoic cavity
•  Primary digestive cavity
•  Yolk sac cavity

Yolk sac cavity

Q7. Mammalian placenta has minute finger like projections called

•  Chorionic villi
•  Chorionic network
•  Chorionic extensions
•  Chorionic plexus

Chorionic villi

Q8. Foetal membranes provide

•  Protection to embryo
•  Nutrition to embryo
•  Protection and nutrition to embryo
•  None of the above

Protection and nutrition to embryo

Q9. The extra-embryonic membranes of the mammalian embryo are derived from

•  Formative cells
•  Follicle cells
•  Inner cell mass
•  Trophoblast

Trophoblast

Q10. Amnion helps in

•  Respiration
•  Excretion
•  Nutrition
•  Protection from shocks

Nutrition