Mechanism of Breathing

Which of the following shows what happens to the chest cavity when air rushes into the lungs?

• decrease in volume

• deflates

• expands

• relaxes

Which of the following happens when you exhale?

• chest cavity expands

• your lumgs become smaller

• your chest cavity becomes smaller

• your lungs take in and give off oxygen

As you breath in and out when do your lungs expand?

• when air rushes in

• when air rushes out

• when your diaphragm expands

• when your chest cavity relaxes

The pathway of air into the lungs is:

• 
• 
• 
• 

Which of the pairs of words below are the waste products of respiration?

• oxygen and water

• oxygen and carbon dioxide

• carbon dioxide and water

• oxygen, carbon dioxide and water

Why does your body need oxygen?

• to produce energy

• to expel carbon dioxide

• to supply the food with oxygen

• to fill the lungs with oxygen

What term refers to the alternative inhaling and exhaling movements of the lungs.

• digestion

• oxidation

• respiration

• relaxation

Why is the diaphragm important to the process of breathing?

• It helps air to be taken in and rushed out of the lungs

• It helps control air movement

• It helps to spread air throughout the lungs

• It helps to purify the air

How do you describe the condition of the diaphragm as one exhales?

• the diaphragm contracts

• the diaphragm relaxes

• the diaphragm goes down

• both a and c

What material in a lung model represents the diaphragm

• Y plastic tubes

• the plastic jar

• the plastic sheet

• 2 small plastic bags