In mammalian embryos, the inner cell mass gives rise to the hypoblast thru the p

ID: 47788 • Letter: I

Question

In mammalian embryos, the inner cell mass gives rise to the hypoblast thru the process of

a. convergent extension

b. radial intercalation

c. delamination

d. epiboly

The trophoblast in mammalian embryos is equivilant to the avian

a. amnion

b. chorion

c. allantoic sac

d. splanchnopleure

e. none of the above

The inner cell mass in mammalian embryos will give rise to all of the following excpt

a. epiblast

b. trophoblast

c. blastocyst

d. hypoblast

e. the inner cell mass gives rise to all these structures

during its migration to the uterus, the presence of the zona pellucida around the zygote:

a. allows it to slide easily down the fallopian tube

b. prevents prmature sperm penetration

c. prevents premature implantation of the zygote into the oviduct

d. helps to maintain proper pH around the zygote during its travel to the uterus

e. permits vascularization to occur around the embryo in the uterus

In mammalian embryos, the embryonic epiblast will give rise to all of the following except

a. embryonic ectoderm

b. primitive streak

c. embryonic endoderm

d. amniotic ectoderm

e. extraembryonic mesoderm

1. In mammalian embryos, the inner cell mass gives rise to the hypoblast through the process of convergent extension.

Thus, the correct option is A. Convergent extension.

2. The trophoblast in mammalian embryos is equivilant to the avian chorion

Thus, the correct option is b. Chorion

3. The inner cell mass in mammalian embryos will give rise to all of the following excpt

e. the inner cell mass gives rise to all these structures

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