28. Pregnancy and Human Development
Embryonic Development
Multiple Choice
Multiple ChoiceWhich of the following does NOT describe a function of trophoblast cells?
A
The inner layers of trophoblasts lose their plasma membranes and invade the endometrium.
B
They secrete hCG.
C
They take part in placental formation.
D
They display L-selectin molecules on their surface after blastocyst hatching.
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