Question

Protein molecules embedded in the structure illustrated below are often utilized during facilitated diffusion. This process is an example of which of the following

cellular processes?
A. Immune response
B. Transport of molecules
C. synthesis of new molecules
D. Energy conversions"

Answer 1

Facilitated diffusion is a form of transport of molecules across cell membranes that uses proteins to move substances down a concentration gradient without requiring energy, distinguishing it as a type of passive transport.

Step-by-step explanation:

The process of facilitated diffusion is a type of transport of molecules across the cell membrane. It utilizes specific proteins, such as channel proteins and carrier proteins, to move substances from an area of higher concentration to an area of lower concentration without the use of cellular energy (ATP). Facilitated diffusion is one of several mechanisms that cells use to transport molecules, and it is driven solely by a concentration gradient, distinguishing it from active transport, which requires energy.

Facilitated diffusion is therefore an example of passive transport, through which ions or polar molecules diffuse across the plasma membrane with the help of membrane proteins that shield them from the hydrophobic parts of the membrane. This mechanism is essential for transporting substances that cannot easily pass through the lipid bilayer, and it represents one of the many ways cells regulate their internal environments.