INBDE Embryology Practice Exam Updated with Correct Answers.

INBDE Embryology Practice Exam
2025-2026 Updated with Correct
Answers.
list the order of development from first to last

a. morula

b. zygote

c. implantation

d. blastula

e. fertilization - Answer e,b,a,d,c



what refers to the inner cell mass that will form the embryo proper - Answer embryoblast



what refers to the outer cell mass that will form the placenta - Answer trophoblast



the embryoblast eventually forms in to what - Answer a bilaminar disc containing epiblast
and hypoblast



the epiblast forms what - Answer 3 germ layers



the hypoblast forms what - Answer nothing it disappears



during which week do the amniotic cavity and yolk sac cavity form - Answer week 2



during which week is implantation complete - Answer 2



which houses the developing baby

a. amniotic cavity

b. yolk sac - Answer a



which is responsible for nutrient and gas exchange until the placenta takes over?

a. amniotic cavity

b. yolk sac - Answer b

, what is gastrulation and when does it occur - Answer transition from single sheet of cells to 3
distinct germ layers - week 3



Responsible for epidermis

a. ectoderm

b. mesoderm

c. endoderm - Answer a



Nervous system

a. ectoderm

b. mesoderm

c. endoderm - Answer a



Teeth

a. ectoderm

b. mesoderm

c. endoderm - Answer a



Facial skeleton

a. ectoderm

b. mesoderm

c. endoderm - Answer a



body skeleton

a. ectoderm

b. mesoderm

c. endoderm - Answer b



all muscles

a. ectoderm

b. mesoderm

c. endoderm - Answer b



connective tissue

a. ectoderm