Endocytosis + Exocytosis B4

Question 1

What are endo and exocytosis classed as?

Answer 1

Bulk transport. requiring ATP

Question 2

What happens during exocytosis?

Answer 2

-Golgi vesicles move very large quantities of molecules (like enzymes, other proteins like insulin) from inside the cell to outside the cell.
-ATP is required to move the vesicles to the cell surface membrane so vesicles can fuse with the membrane

Question 3

What happens during endocytosis?

Answer 3

-The cell surface membrane is pulled inwards to create a vesicle. Any molecules next to that area of the membrane are enclosed (phagocytosis like engulfing) within the vesicle
-The movement of the vesicle into the cell requires breakdown of ATP into ADP + Pi