4 Transport across cell membranes

Question 1

Define Osmosis

Answer 1

the passage of water from a region of higher water potential to a region of lower water potential across a partially permeable membrane

Question 2

Define simple diffusion

Answer 2

the net movement of molecules or ions from a region of high concentration to a region of low concentration until evenly distributed

Question 3

Define facilitated diffusion

Answer 3

the net movement of molecules or ions from a region of high concentration to a region of low concentration until evenly distributed through carrier proteins and channel proteins.

Question 4

Define Active Transport

Answer 4

The movement of molecules or ions into or out of a cell from a region of lower concentration to a region of higher concentration using ATP and carrier proteins.