![]() Isotonic solutions have THE SAME concen- trationof solutes as what is inside the cell.Hypotonic environments swell animal cells.This causes water to move INTO the cell.Hypotonic solutions have a LOWER concentration of solutes than what is inside the cell. ![]() Hypertonic environments shrink animal cells.This causes water to move OUT of the cell.Hypertonic solutions have a HIGHER concentration of solutes than what is inside the cell.Types of Solutions and Movement of Water Hypertonic Solutions Materials can enter or leave the cell based on their size and the amount of substance present(concentration)Ĭell Transport PassiveTransport:small molecules can cross over the cell membrane without using extra energy Diffusion:small particles flow down a con- centration gradient from an area of high to an area of Osmosis:the diffusion of water molecules over the cell membrane Facilitated Diffusion: particles still travel from to, but they pass through channels in the membrane Example: ions.Cell membranes act as barriers, controlling which materials enter and leave the cell.They act as markers to identify the cell.Short chains of carbohydrates are connected to proteins or lipids on the exterior surface of the cell.Some are connected to carbohydrate chains on the exterior of the cell.Some act as channels to transport materials through the membrane.Proteins: many proteins are embedded in the phospholipid bilayer.a double layer of lipids makes up most of the cell membrane.
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