Breathing And Respiration

Question 1

Respiration word equation

Answer 1

Glucose + oxygen -> carbon dioxide + water + (energy)

Question 2

What does respiration mean?

Answer 2

How we get the energy we need

Question 3

Which cells does respiration occur in?

Answer 3

Every cell

Question 4

What gases are exchanged in your lungs?

Answer 4

Carbon dioxide and oxygen

Question 5

Where does gas exchange take place?

Answer 5

Alveoli

Question 6

How can carbon dioxide be detected?

Answer 6

By limewater which turns from colourless to milky white and by bicarbonate indicator which turns from red/orange to yellow

Question 7

How much more do you breathe out than you breathe in?

Answer 7

1%

Question 8

Which chemical in cigarettes is addictive?

Answer 8

Nicotine

Question 9

Features of alveoli

Answer 9

Moist surface, large surface are, thin walls

Question 10

Gas exchange

Answer 10

Oxygen -> carbon dioxide

Question 11

How does inhalation happen?

Answer 11

. Diaphragm contracts and domes up
. The intercostal muscles conract, pulling the rib cage up and out
. The volume (space inside) chest cavity increases
. This causes the air pressure in the chest cavity and lungs to decrease
. The air pressure in the lungs is now lower than the atmospheric air pressure
. Air is drawn into the lungs from higher pressure outside to lower pressure inside

Question 12

How does exhalation work?

Answer 12

. Diaphragm relaxes and flattens
. The intercostal muscles relax, the rib cage moves down and in
. The volume (space inside) chest cavity decreases
. This causes the air pressure in the chest cavity and lungs to increase
. The air pressure in the lungs is now higher than the atmospheric air pressure
. Air is forced out of the lungs from higher pressure inside to lower pressure outside