CPM Certified Professional Midwife

Category - Prenatal

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There are several mechanisms for transport of different substances through the placenta. Which of the following is not a mechanism of transfer through the placenta?

Simple diffusion
Facilitated diffusion
Active transport
None of the above

Explanation

Answer: D - None of the above

The placenta is an organ located in the gravid uterus that connects the mother and fetus via the umbilical cord. The following are mechanisms of transfer through the placenta:

1) Simple diffusion - water and electrolytes
2) Facilitated diffusion - glucose
3) Active transport - amino acid, vitamin.

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