Cells and diffusion

Hannah Steele
Flashcards by Hannah Steele, updated more than 1 year ago
Hannah Steele
Created by Hannah Steele about 7 years ago
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Description

Contains diffusion, Osmosis, Active transport and Cell structure

Resource summary

Question Answer
Extremophiles Have adaptations that enable them to survive in the conditions in which they normally live.
Animal Cell
Plant Cell
Diffusion is the movement of particles from a high concentration to a low concentration
Osmosis is the movement of water particles across a partially permeable membrane from a high concentration to a low concentration of water.
The Solution is ISOTONIC to the cell. The concentration of solutes in the solution outside the cell is the same as the solution inside the cell.
The solution is HYPERTONIC to the cell The concentration of solutes in the solution outside the cell is higher than the concentration inside the cell.
Solution is HYPOTONIC to the cell The concentration of solutes in the solution outside the cell is lower than the concentration inside the cell.
Osmosis is important in living organisms.
Active Transport is the movement of molecules from a low concentration to a high concentration through a carrier protein in a cell membrane, this uses energy.
Concentration difference/ gradient Bigger difference=faster diffusion
Surface area Increasing surface area= faster diffusion
Distance over which diffusion occurs Shorter distance= faster diffusion
Temperature The hotter it is the more kinetic energy molecules have so they move faster and diffusion increases
Larger organisms need special exchange surfaces because larger organisms have a larger surface area and therefore have a small surface area to volume ratio.
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