What system helps start the breathing process without us thinking about it?

• Digestive system

• Autonomic nervous system

• Skeletal system

• Endocrine system

Which medical term most likely means to split in two?

• Biannually

• Left and right

• Split up

• Bifurcate

Answer explanation

The trachea 'bifurcates' at the carina (the location of the splitting).

What do you find at the ends of the bronchioles?

• Alveoli

• Primary Bronchi

• Secondary Bronchi

• Pharynx

What happens to the diaphragm when the body prepares to take in air?

(Hint: 2 answers)

• It disappears

• It contracts

• It flattens

• It expands

What is the name for this process of molecules moving from an area of higher concentration to an area of lower concentration?

• Active Transportation

• Diffusion

• Facilitation

• Movement Spectrum

What happens when the diaphragm and intercostal muscles relax?

(3 answers are correct)

• Increase Pressure in the lungs

• You exhale oxygen

• Decrease the space in the chest cavity

• Cause you to exhale

Where does the exchange of oxygen and carbon dioxide occur in the lungs?

• In the alveoli

• In the diaphragm

• In the bronchi

• In the trachea

What happens to carbon dioxide in the lungs?

• It stays in the lungs

• It is converted to oxygen

• It is exhaled

• It is absorbed