transport in cells

Question 1

what is diffusion

Answer 1

the net movement of particles from a region of high concentration to a region of low concentration

Question 2

give an example of diffusion in the human body

Answer 2

• movement of oxygen in the lungs
• movement of carbon dioxide in the lungs

Question 2

give an example of diffusion in the human body

Answer 2

• movement of oxygen in the lungs
• movement of carbon dioxide in the lungs

Question 3

give an example of diffusion in plants

Answer 3

movement of oxygen and carbon dioxide in or out of the plant leaves

Question 4

give 3 factors that effect the rate of diffusion

Answer 4

1) temperature
2) concentration gradient
3) the surface area

Question 5

what is osmosis

Answer 5

osmosis is the movement of water particles from a dilute solution to more concentrated solution.

Question 6

when does osmosis occur

Answer 6

when two solutions are separated by a partially permeable membrane

Question 7

what is active transport

Answer 7

the movement of ions across a cell membrane into a region of high concentration

Question 8

what does active transport require

Answer 8

energy