Transport across cell membranes
Passive Transport
Active Transport
Def: Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input.
Def: Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane
Def and ex. of molecules
Def: A molecule is defined as two or more atoms of the same element different element that are bound together.
Ex:
H2O (water)
N2 (nitrogen)
O3 (ozone)
CaO (calcium oxide)
CO2 (carbon dioxide)
C6H12O6 (glucose, a type of sugar)
NaCl (table salt)
Endocytosis
Exocytosis
Ion Pump: Na-k pump
Def and function: Is and enzyme found in all animal cells. Its function is to move sodium and potassium ions against large concentration gradients
Def: Exocytosis is the process of moving materials from within a cell to the exterior of the cell.
Def and examples
Def:Endocytosis is a cellular process in which substances are brought into the cell.
Ex: A LDL is used to transport the cholesterol to other cells in the body.