Question

__________________ is when molecules can move freely across a lipid bilayer with a net movement of molecules down their concentration gradient from higher concentration to lower concentration. (chose one and provide an explanation)

i) diffusion
ii) active transport
iii) facilitated diffusion
iv) carrier transport

Answer 1

Option iii) facilitated diffusion

Step-by-step explanation:

`In facilitated diffusion, \\ molecules diffuse \\ across the plasma membrane \\ with assistance from \\ membrane proteins, such \\ as channels and carriers. \\ A concentration gradient exists \\ for these molecules, so \\ they have the potential to \\ diffuse into (or out of) the cell \\ by moving down it.`

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*Sarcastichuman*