The Mechanics of Breathing

Which muscles control the inhalation and exhalation of breathing?

• Ribs and Diaphragm

• Lungs and Intercostal Muscles

• Diaphragm and Intercostal Muscles

• Trachea and Bronchi

When we inhale, the Intercostal Muscles contract causing the Ribs to move...

• Upwards and Outwards

• Inwards and Downwards

Air moves from High to Low Atmospheric Pressure?

• True

• False

When air pressure inside the lungs is less than air pressure in the atmosphere...

• Air moves into the lungs

• Air moves out of the lungs

When the diaphragm and intercostal muscles contract they decrease the volume of the thoracic cavity?

• True

• False

When the diaphragm and intercostal muscles contract they increase the volume of the thoracic cavity?

• True

• False

When the diaphragm relaxes it moves back up into what shape?

• Cube

• Pyramid

• Dome

• Star

During exhalation the volume of the thoracic cavity decreases because the intercostal muscles and diaphragm relax, forcing air

• Into the stomach

• To the heart

• Out of the body

• Into the lungs