Movements Of Substances In and Out Of Cells

Question 1

What is diffusion?

Answer 1

The movement of small molecules from an area of high to low concentration

Question 2

What is osmosis?

Answer 2

The movement of a solvent from a less concentrated (more solvent) to an area of high concentration (dilution)

Question 3

What is active transport?

Answer 3

The movement of molecules from a lower to a higher concentration (against the concentration gradient). Needs energy

Question 4

Why are turgid cells important for the structure of a plant?

Answer 4

They swell up, forcing the plant to grow upwards and not wilt

Question 5

What are the factors that affect the rate of movement in and out of cells?

Answer 5

1. The SA to volume ratio
2. The temperature
3. The concentration gradient