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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 |