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?

Question

Quizplus · Accepted Answer

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.

There Are Several Mechanisms for Transport of Different Substances Through