1.4 breathing and combustion

Question 1

What are the two types of breathing?

Answer 1

1. Chest (thoracic) breathing
2. Abdominal (diaphragmatic) breathing

Question 2

What is gas exchange?

Answer 2

The absorption of oxygen and release of carbon dioxide through the alveoli in lungs

Question 3

How does chest breathing work?

Answer 3

Intercostal muscles contract to move ribs and breastbone upward, expanding chest cavity for inhalation; muscles relax for exhalation

Question 4

How does abdominal breathing work?

Answer 4

Diaphragm contracts and moves downward, pushing abdominal organs forward to expand chest cavity; returns to normal position for exhalation

Question 5

What are the main respiratory muscles?
Back: - Diaphragm

Answer 5

• Diaphragm

Abdominal muscles
Intercostal muscles
Collarbone muscles

Question 6

What happens during inhalation?

Answer 6

hest cavity expands, lungs expand, air is drawn in, oxygen enters bloodstream through alveoli

Question 7

What happens during exhalation?

Answer 7

Muscles relax, chest cavity shrinks, lungs become smaller, air is forced out containing carbon dioxide

Question 8

What is normal breathing?

Answer 8

A combination of both chest and abdominal breathing methods