Diffusion And Osmosis!

Question 0

How does diffusion occur?

Answer 0

• Diffusion is caused by molecules moving and colliding

- The collisions cause the molecules to push away and spread out

Question 1

Diffusion?

Answer 1

• The main method by which small molecules move across the cell membrane
• The process by which molecules tend to move from an area of higher concentration to an area of lower concentration

Question 2

Osmosis?

Answer 2

• The diffusion of water molecules through a selectively permeable membrane
• Since cells can’t function properly without adequate water, many cellular processes depend on osmosis

Question 3

How does osmosis occur?

Answer 3

-Water molecules move by diffusion from an area where they are highly concentrated through the cell membrane to an area where they are less concentrated

Question 4

Passive transport?

Answer 4

• The movement of dissolved materials through a cell membrane without using cellular energy
• Diffusion and osmosis both types of passive transport

Question 5

How does passive transport occur?

Answer 5

-When a cell needs to take in materials that are in higher concentration inside the cell than outside the cell,the movement of materials requires energy

Question 6

Active transport?

Answer 6

• The movement of materials through a cell membrane using cellular energy
• Requires the cell to use its own energy

Question 7

How does active transport occur?

Answer 7

• In one method, transport proteins in the cell membrane “pick up” molecules outside the cell and carry them in.
• Another method is engulfing, which is when the cell membrane wraps around(engulfs)a particle and forms a vacuole within the cell