n diffusion, substances move from areas of (greater) (lesser) to (greater) lesser concentrations.

In diffusion, substances move from a _____ concentration to a _____ concentration. Select one: higher, lower lower, lower higher, higher lower, higher

Select the best answer or answers from the choices given: Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by (a) active transport, (b) diffusion, (c) filtration, (d) osmosis.

Define: simple diffusion, facilitated diffusion. short answer please

Statement 1: The direction of diffusion of a solute across a membrane is determined by its concentration gradient and always moves toward equilibrium. Statement 2: In passive transport, solutes move down the gradient from a region of low concentration to a region of high concentration. A Both statements are true. Both statements are false. C) Statement 1 is true. Statement 2 is false. Statement 1 is false. Statement 2 is true.

Facilitated diffusion is different from simple diffusion because O molecules are small. Owater is transported. energy is used. there is no concentration gradient. proteins act as helpers.

What are the factors affecting the rate of diffusion?

I believe I use the diffusion law on this: (Diffusion Constant × ∆Concentration × Area) / Thickness. Then change the constant into micrometers (x10^-12). Maybe use the fact that oxygen = 16 grams/mol. Am I on the right track? Thank you for any help you can provide.

In terms of their effect on the rate of diffusion, which of the following is the odd one out? a) decreasing the surface area of the membrane b) decreasing membrane permeability c) decreasing lipid solubility of the diffusing molecule d) decreasing the concentration gradient of the diffusing molecule e) decreasing the thickness of the membrane

Which answer is correct (a or b) for the question about why your hands and feet get wrinkled after staying in the bath for too long. a) the water and dissolved particles are drawn out of your skin by diffusion into the large body of water around you. b) the water is actually drawn into your skin by osmosis. explain why (a or b) is correct.