Why are gradients important in diffusion and osmosis?
1 Answer
Feb 1, 2016
Explanation:
If osmosis and diffusion move along the concentration gradient it is known as passive diffusion. Passive diffusion/osmosis is when molecules/water move through a selectively permeable membrane from an area of high to low concentration. Passive diffusion requires no energy.
)
However if diffusion occurs against the concentration gradient it is known as active diffusion. Active diffusion is when molecules move through a selectively permeable membrane from an area of low to high concentration. Active diffusion requires carrier proteins and cellular energy.
)
Here is a video which describes how osmosis impacts onion cells placed into tap water and then into a salt water solution.
Hope this helps!
