Diffusion, Osmosis and Active Transport

Question 1

Diffusion

Answer 1

Particles travel from a point of high concentration to a low concentration. It does not use energy.

Question 2

Examples of Diffusion

Answer 2

O2 into lungs, CO2 out

Question 3

What speeds up diffusion

Answer 3

Higher temperatures, higher pressure, greater concentration difference

Question 4

Osmosis

Answer 4

Movement of water from where there is a High concentration of water to a lower concentration through a semi-permeable membrane

Question 5

Examples of Osmosis

Answer 5

When roots take in water from the soil

Orange squash

When blood takes water from your intestines

Question 6

Active transport

Answer 6

The movement of particles against their concentration gradient. This requires energy (ATP)

They need glucose and oxygen for respiration to release energy/ATP.

If the cells can not get an active supply of oxygen, respiration can not take place. Oxygen, respiration, energy and active transport are interdependent

Question 7

Examples of active transport

Answer 7

Root hair cells use active transport to take up minerals.

Intestines cells use active active transport to take up glucose