click below
click below
Normal Size Small Size show me how
Stack #49531
The Cell Ch 3
| TERM | DEFINITION |
|---|---|
| Cell Theory | All organisms are composed of one or more cells, all organism structure and fx are due to the activites of its cells, cells come from pre-existing cells |
| Light microscope | Visible light is focused on specimen |
| Electrom microscope | Uses beams of electrons which have shorter wavelengths |
| Squamous | thin and flat |
| Cuboidal | Cube-shaped |
| Columnar | Rectangular |
| Spheroid | Round |
| Discoid | Disc shaped |
| Fusiform | Joint |
| Fibers | long and slender |
| Stellate | Star like |
| Apical surface | Top |
| Lateral | Sides |
| Basal | Bottom |
| Filtration | Particles pushed through membrane by hydrostatic pressure |
| Bulk Flow | Collective movement of substances in one direction due to force |
| Diffusion | net movement from high to low concentration of molecules |
| Diffusion Rates Affected by: | Temperature,Molecular Weight,Concentration, Surface Area,and Permeability |
| Osmosis | diffusion of Water from an area of high concentration of molecules to low |
| Osmotic Pressure | hydrostatic pressure on one side of mebrane strong enough to resist osmosis |
| Hypertonic | more solute, less water; causes crenation |
| Hypotonic | less solute, more water; may lyse(burst) |
| Tonicity | ability of solution to effect the volume and pressure within a cell |
| Dialysis | diffusion of solutes through a selectively permeable membrane |
| Facilitated diffusion | movement of solute down a gradient with help of carrier protein |
| Carrier mediated Diffusion | uses carrier protein embedded in CM |
| Active transport | carrier mediated up a cancentration gradient |
| Co transport | Carries 2 molecules |
| Symport | binds 2 molecules, moves in same direction |
| Antiport | 2 solutes moved in oppsite direction |
| Bulk transport | Large polymers, droplets, and particles are moved across membrane |
| Exocytosis | To outside of cell |
| Endocytosis | to inside of cell |
| Phagocytosis | engulfs, eats large particles |
| Pinocystosis | cell drinking |