Chapter 4 - Breathing

Question 1

When you breathe out

Answer 1

Intercostal muscles relax and the ribs move down and in and the diaphragm domes in decreasing the volume of your thorax. The pressure increases and is forced out of your lungs.

Question 2

Alveoli

Answer 2

Provide a very large surface area and rich blood capillaries so gases can diffuse into and out of the blood efficiently.

Question 3

Aerobic respiration

Answer 3

Glucose + oxygen ➡️ carbon dioxide + water

C6H12O6 + 6O2 ➡️ 6CO2 + 6H2O

Question 4

Anaerobic respiration

Answer 4

Glucose ➡️ lactic acid +energy

c6H12O6 ➡️ 2C3H6O6 + energy

Question 5

Oxygen debt

Answer 5

After exercise oxygen is still needed to break down the lactic acid build up.

Question 6

When you breathe in

Answer 6

Intercostal muscles contract to move rips up and out of the diaphragm flattens which increases the volume of your thorax. The pressure decreases and moves into your lungs.