GENERAL HISTOLOGY

INTRODUCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
During diffusion, molecules tend to move
A
up the concentration gradient
B
from an area of lower concentration to an area of higher concentration
C
in a direction that doesn’t depend on concentration
D
down the concentration gradient
Explanation: 

Detailed explanation-1: -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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