Bulk Tranpsort Flashcards
1
Q
What is endocytosis?
A
• Bulk transport of substances INTO the cell.
• membrane engulfs material
• membrane fuses together
• vesicle is formed
• ATP required
• active process
2
Q
What is exocytosis?
A
• bulk movement of material OUT OF the cell
• vesicle fuses with the membrane
• substances moved out of the cell
• ATP required
• active process
3
Q
Give 2 examples of bulk transport
A
• hormones - pancreatic cells make and package insulin into vesicle in the Golgi apparatus. When the vesicles fuse with the membrane the insulin is released into the blood stream
• white blood cells - engulfing microorganisms by forming a vesicle around them and then allowing the vesicle to fuse with a lysosome in the WBC to allow digestion of the microorganism (phagocytosis)
