| A | B |
|---|
| osmosis | the movement of water through a membrane from an area of high concentration to an area of low concentration |
| cell membrane | the organelle that controls homeostasis |
| isotonic | a solution that is in equilibrium, also when two solutions are equal on each side of the plasma membrane |
| lipid bilayer | the cell membrane is composed of these two layers |
| concentration gradient | the concentrations on either side of a membrane are not the same |
| fluid mosaic model | the sideways movement of phospholipid molecules in a cell membrane |
| lipids | fats or oils that are insoluble in water |
| cholesterol | molecules that slow down the motion of the cell membrane |
| hypotonic | solution having more water outside a cell then inside which causes water to enter into a cell |
| diffusion | the movement of a substance from an area of high concentraion to an area of low concentration |
| polar | when molecules attract to water they are said to be this |
| nonpolar | not able to dissolve in water because they are not attracted to water |
| homeostasis | the balance between the inside of the cell and the outside of the cell causing a balance in the body |
| selevtive permeability | the ability to decide what enters and what leaves a cell |
| hypertonic | a solution that causes a plant to wilt |
| phospholipids | molecules that make up a cell membrane |
| protiens | molecules that form doorways into the plasma membrane |
| pinocytosis | the ability of a one celled organism to trap water into vacuoles by extending projections of cytoplasm around the liquid |
| phagocytosis | the ability of a one celled organism to trap food into vacuoles by extending projections of cytoplasm around the food particles |
| active transport | when molecules pass through the plasma membrane and go against a concentration gradient |
| turgor pressure | pressure in a cell |
| random motion | motion of molecules with no set pattern |
| kinetic energy | the energy displayed by molecules |
