Ch 2.2 Breathing Mechanics

Where can the diaphragm be found?

• In the mouth

• Between the ribs

• Below the lungs

• Above the lungs

What is the role of the intercostal muscles during normal breathing?

• To cause the ribcage to move downwards and inwards

• To move the chest cavity upwards and outwards

• To flatten the diaphragm

• To relax the diaphragm

What is the technical term for breathing in?

• Inspiration

• Expiration

• Ventilation

• Respiration

What happens to the chest cavity and lungs when the diaphragm contracts and the intercostal muscles also contract?

• They shrink

• They expand

• They move downwards

• They stay the same

What causes oxygen-rich atmospheric air to rush into the lungs during inhalation?

• Decrease in lung volume

• Decrease in air pressure inside the lungs

• Increase in lung volume

• Increase in air pressure inside the lungs

What happens to the diaphragm and intercostal muscles during exhalation?

• Both relax

• Both contract

• Diaphragm relaxes and intercostal muscles contract

• Diaphragm contracts and intercostal muscles relax

What is the long-term effect of sustained exercise on the respiratory muscles?

• Decreases the strength of the diaphragm

• Decreases the strength of the intercostal muscles

• Increases the strength of the diaphragm

• Increases the strength of the lungs

What enables aerobic athletes to compete at higher intensities and for longer periods of time?

• Increased strength of the diaphragm

• Decreased strength of the intercostal muscles

• Decreased strength of the diaphragm

• Increased strength of the lungs

What is the process of breathing out also known as?

• Expiration

• Ventilation

• Respiration

• Inspiration

What happens to the chest cavity and lungs during exhalation?

• They expand

• They move downwards

• They shrink

• They stay the same