Chapter 3 - Plant Nutrition and Transport

Question 1

Define Diffusion

Answer 1

The net movement of particles from an area of high concentration to an area of lower concentration

Question 1

Define Osmosis

Answer 1

Movement of water from High -> Low Concentration through a semi-permeable membrane

Question 2

Define Active Transport

Answer 2

The movement of substances against their concentration gradient (Low -> High concentration)

Question 3

Give an example of Diffusion in the human body

Answer 3

Oxygen diffusing from alveoli -> capillaries

Question 4

What happens to the rate of diffusion when temperature is increased?

Answer 4

Rate of Diffusion Increases

Question 5

How do you increase rate of diffusion?

Answer 5

Increase the Surface Area : Volume ratio

Question 6

Define the term ‘Plasmolysed’

Answer 6

Cell membrane pulls away from cell wall

Question 7

Define the term ‘Incipient Plasmolysis’

Answer 7

No net movement

Question 8

Define the term ‘Turgid’

Answer 8

Cell expands by diffusion putting pressure on the cell wall