Diffusion

Question 1

What is diffusion

Answer 1

The spreading out of particles from an area of high concentration to an area of low concentration

Question 2

What eventually happens with diffusion

Answer 2

Resulta in equilibrium (equal number of particles on each side)

Question 3

Does diffusion require energy

Answer 3

No as particles move down the concentration gradient easily

Question 4

What are the factors which affect the rate of diffusion

Answer 4

Higher temperature (particles have more energy)
larger Concentration gradient (difference in concentration)
Particle size
Larger Surface membrane surface area (more particles can pass through at once)

Question 5

Give examples of diffusion

Answer 5

Diffusion of oxygen from the lungs into the blood

Diffusion of carbon dioxide through the stomata and into the spongy mesophyll

Question 6

How are gases exchanged in the lungs

Answer 6

Oxygen diffuses our of the alveoli and into the blood and carbon dioxide diffuses our of the blood and into the alveoli

Question 7

Examples of molecules that diffuse into plant cells

Answer 7

CO2 and O2 in the leaves

Glucose from the palisade cells into the xylem

Question 8

Examples of molecules that diffuse into animal cells

Answer 8

O2 diffuses into the blood stream through the lungs and to cells for respiration
CO2 out of the blood stream into the lungs then breathed out (waste product of respiration)