Please enable JavaScript.
Coggle requires JavaScript to display documents.
movement of substances (diffusion (concentration gradient (the difference…
movement of substances
diffusion
the net movement of particles from a region of higher concentration to a region of lower concentration down a concentration gradient.
-
-
diffusion takes place during the exchange of gases in our lungs and the diffusion of mineral salts in the root hair cells.
osmosis
osmosis is the net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane
-
when water potential outside the plant and animal cell is higher than inside the cell itself the water will move in causing the plant cell to expand and becomes turgid but the animal cell will expand and eventually burst.
but when water potential inside the cell is higher than outside the cell, water from the cells will move out causing the animal cell to shrink and become flasid or plasmolysed and causing the animal cell to shrink and become crenated.
active transport
movement of substances across a membrane against a concentration gradient where energy from respiration is required
-
-