Understanding the Respiratory System

What is the main muscle used for breathing?

• The heart

• The diaphragm

• The biceps

• The triceps

Are both the left and right lung the same size? Why or why not?

• Yes, they are the same size because they have the same function.

• No, the right lung is larger because it has three lobes while the left has two.

• Yes, they are the same size to balance the body.

• No, the left lung is larger because it needs more space for the heart.

What are all the pathways in which air takes when we inhale air?

• Nose, trachea, bronchi, alveoli

• Mouth, esophagus, stomach, intestines

• Nose, bronchi, trachea, alveoli

• Mouth, trachea, bronchi, alveoli

Where in the lungs does gas exchange take place?

• In the bronchi

• In the alveoli

• In the trachea

• In the diaphragm

What diffuses from the alveoli into the capillaries during gas exchange?

• Carbon dioxide

• Oxygen

• Nitrogen

• Water vapor

What diffuses from the capillaries into the alveoli during gas exchange?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What type of cell carries oxygen throughout the body?

• White blood cells

• Red blood cells

• Platelets

• Neurons

What is the role of mucus and cilia in the respiratory system?

• To digest food

• To trap and remove particles and pathogens

• To produce oxygen

• To pump blood

What is Cell respiration?

• The process of converting food into energy.

• The process of photosynthesis

• The process of breathing in and out

• The process of converting carbon dioxide into energy

What is ATP?

• A type of protein

• A molecule that stores and transfers energy in cells

• A type of sugar

• A type of fat