Which of the following substances is normally transported across the plasma membrane by exocytosis?
A)carbon dioxide gas
B)bacteria
C)ions
D)fat-soluble vitamins
E)neurotransmitters

Question

Quizplus · Accepted Answer

Exocytosis is a process by which large molecules are transported out of the cell by fusing with the plasma membrane. Neurotransmitters are large molecules that are released from neurons and transported across the membrane by exocytosis. Carbon dioxide is a small molecule and diffuses across the membrane by simple diffusion. Bacteria are not normally transported across the plasma membrane. Ions can be transported across the membrane by various mechanisms such as facilitated diffusion or active transport. Fat-soluble vitamins can enter the cell by simple diffusion or mediated transport.

Which of the Following Substances Is Normally Transported Across the Plasma