1. Movement of Materials in Cells
Passive Transport Active Transport
*Diffusion *Endocytosis
*Osmosis *Exocytosis

2. 24/7 - 365! Materials are ALWAYS on the move!
Cells are constantly trying to maintain HOMEOSTASIS (Balance)!
When the amount of material INSIDE the cell is different than the amount of material OUTSIDE, the cells seek balance.
When the molecules are even throughout a space - it is called EQUILIBRIUM

3. Passive Transport—No ENERGY!!
This is the EASY way for substances to move.
The cell does not have to use any energy. (NO ENERGY USED!!!)
High to Low concentration—Down Hill!
2 types: osmosis & diffusion

4. Diffusion
process by which molecules move from areas of high concentration to areas of lower concentration.
From MORE (High)--> LESS (LOW).
Down Hill!

5. Osmosis—WATER!
process by which WATER moves from areas of high concentration to areas of low concentration.
From MORE (HIGH)--> LESS(LOW)
Down Hill!
Osmosis is the “diffusion” of water

6. Osmosis animation *Water molecules are the small blue shapes.
*Salt is the green.

7. Active Transport-Uses ENERGY!!
Sometimes cells have to use or spend energy to get things across the cell membrane
Endocytosis and Exocytosis
Going against gravity…Up Hill!
From LESS (Low) --> MORE (HIGH)

8. 2 types of active transport
Endocytosis - taking “in” food
Exocytosis – taking “out” waste, “exiting”

10. Congratulations!!
A healthy cell is a HAPPY cell.