Bulk Transport

• What are the two versions of bulk transport

  Endocytosis and exocytosis
• what is endocytosis


  when material is engulfed by extensions of the plasma membrane and cytoplasm surrounding it making it a vesicle
• what’s the 2 examples of endocytosis


  phagocytosis and pinocytosis
• what’s phagocytosis 


  The uptake of solid material that’s too large to be taken in by active transport or diffusion
• what happens when granulocytes engulf bacteria 


  a lysosome fuses with the vesicle formed and enzymes digest the cells (products absorbed into the cytoplasm)
• whats pinocytosis


  uptake of liquid by the same mechanism as phagocytosis although vesicles are smaller
• what’s exocytosis 


  process that substaces leave the cell having been transported through the cytoplasm in a vesicle which fuses with cell membrane
• example of something that is secreted by exocytosis 


  Digestive Enzymes
• what does the cell membrane need to do when exo or endo happens 


  change shape
• is the cell membrane changing shape an active process and if so what does it require 


  yes and it requires ATP generated by the cells respiration
• does endo increase or decrease the overall area of the cell membrane 


  Decrease
• does endo increase or decrease the overall area of the cell membrane 


  Decrease
• does exo increase or decrease the overall area of the cell membrane


  increase
• which property of the cell membrane is essential for Endo and exo to occur 


  Fluidity of the membrane