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Question:Science homework help. I am in year 10 and need to compare diffusion, osmosis and active transport. Thanks.

Answers:Diffusion is the net movement of a substance from a region of high concentration to a region of low concentration. Osmosis is the net movement of water molecules from a high concentration to a low concentration across a partially permeable membrane (e.g. the cell surface membrane of a cell) Active Transport is the movement of molecules across a cell membrane against its concentration gradient. It requires energy (ATP) to accomplish this. I hope that helped!

Question:A) facilitated diffusion moves substances down their concentration gradient and active transport moves them against their gradient. B) facilitated diffusion does not rely on cellular energy and active transport does. C) facilitated diffusion uses channel or carrier proteins and active transport does not. D) A and B only E) A, B, and C



Answers:active - uses energy, against concentration gradient, uses proteins passive - no energy, with concentration gradient, uses proteins diffusion - no energy, with concentration gradient, no proteins make it a good day

Question:What are one similarity and two differences between facilitated diffusion and active transport?

Answers:Facilitated transport and active transport both utilize proteins to transport substances across membranes. Active transport requires an input of energy, usually ATP, while facilitated transport does not. Active transport can transport chemicals against their concentration gradients while facilitated transport cannot.