TYPES OF TRANSPORT

• Passive Transport


  Type of transport that uses no energy.
• Simple Diffusion


  Passive Transport

  • materials flow from high concentration area to low concentration area without using energy
  • related to osmosis, which involves transport of solvent molecules across a semipermeable membrane from a region of high to low concentration.
• Facilitated Diffusion


  Materials flow from an area of high concentration to an area of low concentration without using energy and with the help of transport proteins.
• Osmosis

  Water moving from an area of higher concentration to an area of lower concentration. This happens across a semipermeable membrane, a membrane that only lets certain molecules pass through.

  • Hypotonic Solution - lower concentration of solute than cell, making it swell as water enters
  • Hypertonic Solution - higher concentration of solute than cell, making it shrink as water leaves
  • Isotonic Solution - has equal concentration, therefore the cell neither shrinks nor swells
• Active Transport


  Type of transport that requires energy. Materials flow from an area of low concentration to an area of high concentration with the use of energy.
• Bulk Transport

  The transport of materials through the use of vesicles.

  • Phagocytosis - cell eats a particle by packaging it into a food vacuole
  • Pinocytosis - cell drinks extracellular fluid into tiny vesicles
  • Endocytosis - cell "eats and drinks" particles and fluids through the help of receptors