1.2 gas exchange and respiration

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

1.2 Gas exchange and respiration

what is air?

what happens during gas exchange?

what is diffusion?

which compound isn't part of the air we breathe?

1. oxygen
2. nitrogen
3. carbon dioxide
4. helium

what is air?

a mixture of....

oxygen, carbon dioxide, nitrogen and water vapour

what happens to these gasses?

which gas isn't used in our body?

1. carbon dioxide
2. oxygen
3. nitrogen
4. water vapour

cellular respiration

glucose + oxygen => water vapour + carbon dioxide + energy

C6H12O6 + 6 O2 => 6 CO2 + 6 H2O + energy

Explain the percentages on page 13. Why do they change during in/exhaling

experiment 16 page 13 wb

we read the experiment together

we do the experiment in groups of four

we discuss your results

finish the sentence...
lime water is an indicator for.............

homework

 study pages 13, 14, 15 (only gas exchange) do excercises 9, 10, 15, 17, 18, 19

diffusion

explain the meaning of diffusion in your own words

In diffusion a substance moves from ...

1. a high to a low concentration
2. a low to a high concentration

Which change would not speed up diffusion in an animal cell?

1. Make the membrane thinner
2. Move the blood supply closer to the cell
3. Make the cell rounder
4. Increase the concentration gradient

page 16 talking point

fill in the correct answers.

what is osmosis?

homework

day 1: study pages 15,16,17

do excercises 11,12,13,14

day 2: study 1.3 do excercises 20,21,22,23,24