Question

one key purpose of the amniotic fluid is to
a. maintain a constant temperature for the embryo
b. screen the flow of blood between mother and embryo
c. provide the embryo with nutrients
d. stimulate development of neurotransmitters

Explanation:

Amniotic fluid helps keep embryo's temperature stable. It doesn't screen blood - flow, provide nutrients (placenta does that mainly), or stimulate neurotransmitter development.

Answer:

A. maintain a constant temperature for the embryo