Bulk Tranpsort

Question 1

What is endocytosis?

Answer 1

• Bulk transport of substances INTO the cell.
• membrane engulfs material
• membrane fuses together
• vesicle is formed
• ATP required
• active process

Question 2

What is exocytosis?

Answer 2

• bulk movement of material OUT OF the cell
• vesicle fuses with the membrane
• substances moved out of the cell
• ATP required
• active process

Question 3

Give 2 examples of bulk transport

Answer 3

• 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)