The cell Flashcards
The gatekeeper of the cell controlling what comes in or out of the cell
Cell membrane
The ability to inhibit larger molecules from entering while allowing smaller molecules to pass through
Selective permeability
Small molecules freely move across the membrane from areas of high concentration to low concentration
Diffusion
The movement of materials through the membrane without the use of energy
Passive transport
The diffusion of water molecules across a selectively permeable membrane
Osmosis
Molecules using protein channels in the cell to diffuse in or out using no energy
Facilitated diffusion
The movement of materials across a cell membrane using cellular energy
Active transport
The cell membrane changes shape and engulfs the particle pinching off a vacuole within the cell
Endocytosis
Allows for large particles to leave this cell, requiring energy
Exocytosis
Name most common elements in the cell
Hydrogen, oxygen, nitrogen, carbon, phosphorus, sulfur