Biology pt.4 Flashcards
What model is the accepted model for the structure of the cell membrane
Fluid Mosaic Model
Break down the name “Phospholipid Bilayer”
Phosphor = phesphate
Lipid = fats
Bi = two
How far and how fast particles move depends on what two things?
The concentration of the substance there in and the state of the substance
How are solids different than liquids and gasses
they have a definite shape and volume, dont flow or compress readily, ad have the least amount of motion
How are liquids different from solids and gases
they take up the shape of the container but has a definite volume, doesn’t compress readily but flows readily.
What are some characteristics of gases
take both the shape and volume of their container, highly compressible and flow readily, has the highest amount of motion
Particles are constantly _______ and move least in _____ and most in ______.
Constantly Moving
Least in solids, most in Gases
What happens when you heat particles
They move faster
The particles of matter are attracted to one another or are “________”
Bonded
__________ Refers to the amount of a substance dissolved in a solvent, usually water
Concentration
A Concentration _________ exists when there is a difference in the amount of solute on either side of the membrane
Concentration Gradient
Solutes naturally move _____ the gradient, on an area of high concentration to low
Down
Why is the cell membrane reffered to as Semi-permeable
Because only some substances can get through (selectively permeable)
Why is Diffusion classified as Passive Transport
Because it flows down the concentration
Other than diffusion, was is another form of passive transport
Osmosis, which is similar to diffusion, but only deals with the movement of water molecules
