Cellular Transport

Question 1

What is Passive Transport and what are the three types?

Answer 1

D-
A process that does not require energy to move molecules from a HIGH to LOW concentration

3 types

-Diffusion
-Facilitated Diffusion (uses proteins to push particles across)
-Osmosis

Question 2

What is the difference between simple diffusion and facilitated diffusion?

Answer 2

*Simple Diffusion is the movement of small particles across the cell membrane like the cell membrane until homeostasis is reached.

*Facilitated diffusion requires the help of carrier and channel proteins
These particles move from an area of high concentration to an area of low concentration.

Question 3

What’s the difference between a channel protein and a carrier protein?

Answer 3

Channel proteins: tube like protein that selectively diffuses particles
Carrier proteins: Changes shape when particle binds to it

Question 4

What is Osmosis?

Answer 4

D-
Osmosis is the movement of water through a selectively permeable membrane like the cell membrane
Water moves across the cell membrane from an area of high concentration to an area of low concentration.

Question 5

What is Active Transport?

Answer 5

D-
Active transport is the movement of molecules from LOW to HIGH concentration.
Energy is required as molecules must be pumped against the concentration gradient.
Proteins that work as pumps are called protein pumps.