Osmosis, Diffusion, Cell Membranes (CH.6) Flashcards
What is Brownian Motion?
The random, erratic movement of molecules
What is Diffusion?
The movement of molecules from an area of high concentration to low concentration
Using a perfume bottle, give an example of how diffusion works:
High concentration:: the scent molecules in the bottle
Low concentration:: scent molecules in the surrounding air (as the scent molecules spread in the air)
What is the concentration gradient?
The difference of concentration of a substance between areas
What is equilibrium?
When the concentration in two areas are the same
What is a solvent?
The substance doing the dissolving
What is a solute?
The substance that is being dissolved
What is a solution?
The solvent + solvent
Give an example of a solvent, solute, and a solution?
Solvent:: Black Coffee
Solute:: Milk
Solution:: Light brown coffee
What is Osmosis?
The diffusion of water across a selectively permeable membrane. From a high concentration to low concentration
What is the end behavior of the cell in a hypertonic environment?
The cell shrinks
What is the end behavior of the cell in a hypotonic environment?
The cell gets bigger
What is the purpose of the cell membrane?
To control what goes in + out of the cell.
Is the cell membrane, selectively permeable?
Yes
What is hypertonic?
If the number of solutes outside of the cell is bigger than inside the cell
