Lung Physiology

What muscles are used in breathing in and breathing out?

• diaphragm and intercostals
• diaphragm and lungs
• lungs and ribs
• lungs and diaphragm

What is the role of the alveoli?

• to remove air
• allow air to travel to the alvelous
• gaseous exchange and diffusion

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

Given the following structures:
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation. 

• 1,2,3,4
• 2,3,1,4
• 2,1,3,4
• 4,2,3,1 

When the diaphragm contracts...

• the volume of the thoracic cavity increases and the pressure decreases, causing air to rush into the lungs.
• the volume of the thoracic cavity decreases and the pressure increases causing air to rush out of the lungs. 

Check off which things happen when you inhale (there are two!)

• Chest cavity expands

• Chest cavity gets smaller

• Diaphragm contracts

• Diaphragm relaxes

The thin skeletal muscle that sits at the base of the chest and separates the abdomen from the chest. It contracts and flattens when you inhale.

• Intercostal

• Diaphragm

• Epiglottis

• Larynx

The "gate" that prevents food or fluid from entering the trachea.

• Pharynx

• Larynx

• Esophagus

• Epiglottis

What is the process called when you breath in the air?

• inspiration

• expiration

What is the process called when you breath out the air?

• inspiration

• expiration