25 terms

Biology Quiz Homeostasis And Cell Transport

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Passive Transport
Does not require energy from the cell
Concentration Gradient
Difference in the concentration of molecules across a space
Equilibrium
Concentration of molecules is equal throughout a space
Diffusion
Movement of a substance down the substance's concentration gradient
Hypertonic solution
Causes the cell to shrink because of osmosis
Osmosis
Diffusion of water through a membrane
Hypotonic Solution
Causes a cell to swell because of osmosis
Isotonic Solution
Concentration of both solutions is equal
Ion Channel
Transport protein through which ions can pass
Carrier Protein
Protein used to transport specific substances across a membrane
Fascilitated Diffusion
Passive transport using carrier proteins
Active Transport
Movement of a substance against the substance's concentration gradient
Sodium-Potassium Pump
An example of a cell membrane "pump"
Endocytosis
Movement of a substance by a vesicle to the inside of a cell
Exocytosis
Movement of a substance by a vesicle to the outside of a cell
Vesicle
organelle that fuses with lysosomes in order that contents can be digested
Contractile Vacuole
Organelle that pumps water out of the cell
Diffusion
Random movement of molecules
Osmosis
Diffusion of water and nothing else
Fascilated Diffusion
Movement of particles by diffusion but with the help of a protein carrier
Ion Channels
Movement of ions across the cell membrane with the help of a protein molecule
Active Transport
Movement of a molecule across the cell membrane against diffusion
Sodium/Potassium Pump
Proteins move these ions low to high
Endocytosis
Whole cell membrane moves to surround something outside of the cell
Exocytosis
Cell membrane fuses with vesicles and pushes the content out of the cell