Which of the following would be likely to require facilitated diffusion to move across the plasma membrane?

Question

Quizplus · Accepted Answer

Facilitated diffusion involves movement of molecules across a membrane through a transport protein (channel or carrier) without using energy. Water (A), oxygen (C), and carbon dioxide (D) can diffuse across the membrane without assistance. Sodium ions (Na⁺), hydrogen ions (H⁺), sugars, and amino acids (B) have a charge or a large size that prevents them from crossing the membrane freely, requiring the assistance of transport proteins for facilitated diffusion.

Which of the Following Would Be Likely to Require Facilitated