Cell Transport Flashcards
What is the most important organelle in cell transport
Cell membrane. Controls what allows it to control what materials go in and out of the cell,
Made of phospholipid bilayer
What is hydrophilic
Phosphate group face outside
What faces inside
Hydrophobic groups
What is diffusion
Movement from high concentration to low
Passive transport
What is osmosis
Water moves from high to low concentration
What is passive transport
Materials move freely across membrane
What is active transport
Energy is needed to move across membrane
Hypotonic
Has more solute inside than out
Water moves in
Hypertonic
More solute outside the cell
Water moves out
Isotonic
Solute and water are equal concentration
Facilitated diffusion
When proteins are needed for molecules to passively move across the membrane. Channel proteins create channels through which small water soluble particles can pass through
Carrier proteins can attach to larger molecules to change their shape to fit through the membrane
Endocytosis
Type of active transport
If a molecule is too big a vesicles is formed
Fluids go in the cell
Exocytosis
Type of active transport
Helps transport molecules out of the cell
Pinocytosis
Type of endocytosis
Intake of fluids along with small molecules
Phagocytosis
Type of endocytosis
Intake of large particles from extra cellular fluid
