Diffusion:

Question 1

What is diffusion?

Answer 1

• Spreading out of particles resulting in a net movement from an area of higher concentration to an area of lower concentration.

Question 2

Diffusion of Oxygen:

Answer 2

• Cells need oxygen for respiration which is carried out by the mitochondria.
• The concentration of oxygen is higher outside of the cell as it is being transported in the blood from the lungs.
• The concentration is lower outside of the cell.
  Travels from an area of high concentration to low concentration.

Question 3

Diffusion of Carbon Dioxide:

Answer 3

• Respiration produces the waste gas of carbon dioxide.
• Higher concentration of co2 inside of the cell then outside of the cell.
• ## Co2 moves out of the cell by diffusion.

Question 4

Diffusion of Urea:

Answer 4

• Waste product produced in cells.
  -Diffuses out of the cell into the blood plasma and is excreted by the kidneys.
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Question 5

What is the difference in concentration called?

Answer 5

• Concentration Gradient.

- Greater the concentration Gradient= faster diffusion takes place.

Question 6

How does temperature affect the rate of diffusion?

Answer 6

• Higher temperature= Greater rate of diffusion.
• ## Particles have more kinetic energy + Moving faster.

Question 7

How does the surface area of the membrane affect the rate of diffusion?

Answer 7

• Greater the surface area=Higher rate of diffusion.

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