9.2 Diffusion Flashcards
Facilitated Diffusion
Movement of molecules from high concentration to low concentration with the help of channel proteins. Proteins are specific to the substance it transports.
Simple Diffusion
Movement of molecules from high concentration to low concentration with no help.
Active Transport
Cells move molecules against the concentration gradient (Low concentration to high concentration). This takes energy and uses a protein pump.
Osmosis
Diffusing water to dilute solutes.
Hypertonic
High concentration of solutes, low concentration of water. Water moves into the solutes.
Hypotonic
Low concentration of solutes, high concentration of water. Water moves out of the solutes.
Isotonic
Equal concentration of solutes and water. Water doesn’t move.
Diffusion of Large Molecules
Uses vesicles to move the large molecules across the membrane.
Endocytosis
When a large molecule enters the cell using vesicles.
Exocytosis
When a large molecule exits the cell using vesicles.
Hydrophilic Phospholipid
Polar, charged, and not symmetrical.
Hydrophobic Phospholipid
Nonpolar, not charged, symmetrical.
Transporter
Lets things in or out of the cell membrane.
Enzyme
Converts a molecule in the cell membrane.
Cell Surface Receptor
Receives signals inside the cell membrane.
Cell Adhesion
Connects cells in the cell membrane.
Cell Surface Identity Marker
Shows what the molecule in the cell membrane is.
Cell Surface Connectors
Attach to the cytoskeleton in the cell membrane.
Glycolipids and Glycoprotiens
They are key in cell recognition, organ and tissue development, and the immune system.
