Question

Describe two variables that affect the rate of diffusion in biological systems. Which factors influence the movement of molecules across cell membranes?

a) Temperature and color
b) Pressure and volume
c) Concentration gradient and membrane permeability
d) Atomic weight and molecular structure

Answer 1

The rate of diffusion in biological systems is influenced by the concentration gradient and membrane permeability.

Step-by-step explanation:

Diffusion in biological systems is influenced by two variables: the concentration gradient and the membrane permeability. The concentration gradient refers to the difference in concentration of molecules on either side of the cell membrane. The larger the gradient, the faster the rate of diffusion. Membrane permeability refers to how easily molecules can pass through the cell membrane. If the membrane is highly permeable, diffusion will occur more quickly.