EOC REVIEW: CELLULAR PROCESSES- Types of Cell Transport Flashcards
What is the concentration graident?
The difference in concetntarition of a substance across a space or membrane
What is passive transport?
high to low; no energy
What is active transport?
low to high; energy used
What is diffusion?
Molecules move down (with) the concentration gradient
What types of molecules are in passive diffusion?
Small, non-polar molecules
What is facilitated diffusion?
Protein channel allows polar and large molecules to diffuse across a membrane
What types of molecules use facilitaed diffusion?
Polar and large
What is osmosis?
The diffusion of water across membranes, usually by aquaporins but water can do regular diffusion too.
What is tonicity?
Tonicity is the ability of a surrounding solution to cause a cell to gain or lose water.
What is an isotonic solution?
There is the same amount of solute
What is a hypotonic solution?
The cell will grow; there is less solute in the cell
What is a hypertonic solution?
The cell will shrink; there is more solute in the cell
True or false: We can uses these terms to describe the environment or the cell and they will always be opposite (if the cell is hypertonic the envrionment is hypotonic)
True
What is active transport?
Molecules move against the concentration gradient
Does active transport use energy?
Yes!
What is the Sodium-Potassium Pump?
It is a primary way of active transport
What is symport?
Both molecules move in the same direction across the membrane
What is antiport?
Molecules move in opposite directions across the membrane
What is endocytosis?
Engulfing substances into the cell by forming vesicles
What types of molecules are present in endo and exo cytosis?
Large molecules
What is exocyotis?
Expelling substances out of the cell
What performs exo and endo cytosis?
Vesicles
