In homeostasis, what is the difference between a contractile vacuole in a unicellular organism versus exocytosis in a cell?
A contractile vacuole helps in getting rid of excess water by contracting so this excess water goes outside the cell. It keeps working all the time.It is an organelle that is always there, not created when needed.
Exocytosis is a process for the cell to send big molecules outside the cell, and not excess water. The vesicles are created when the molecule is prepared, so these vesicles are not there all the time.These vesicle fuse with the cell membrane by the end and are o longer there when the task is over.