Cell Transport Overview

Cell Transport Graphic Organizer Diffusion -Active or Passive: Passive -Description: Small nonpolar molecules (ex. oxygen, carbon dioxide) moving directly through the cell membrane. -Direction of Movement: High to a low concentration -Energy Needed: No -Protein Needed: No Osmosis -Active or Passive: Passive -Description: The movement of water across the cell membrane. -Direction of Movement: High to a low concentration -Energy Needed: No -Protein Needed: No Facilitated Diffusion -Active or Passive: Passive -Movement of substances down a concentration gradient added by proteins ((ex. polar substances (H20) or ions (Salt, NH+)) -Direction of Movement: High to a low concentration -Energy Needed: No -Protein Needed: Yes Protein Pump -Active or Passive: Active -Description: Carrier proteins using energy to move substances -Direction: Low to a high concentration -Energy Needed: Yes -Protein Needed: Yes Receptor Mediated Endocytosis -Active or Passive: Active -Description: Specific substances that binds to receptor proteins which trigger cell to perform endocytosis -Direction: Low to a high concentration -Energy Needed: Yes -Protein Needed: Yes Phagocytosis -Active or Passive: Active -Description: Cell bringing in solid materials by vesicle; "cell-eating" -Direction: Low to a high concentration -Energy Needed: Yes -Protein Needed: No Pinocytosis -Active or Passive: Active -Description: Bringing liquids into the cell using a vesicle; "cell-drinking" -Direction: Low to a high concentration -Energy Needed: Yes -Protein Needed: No Exocytosis -Active or Passive: Active -Description: Waste and hormones are excreted from the cell. -Direction: Low to a high concentration -Energy Needed: Yes -Protein Needed: No 1/1