Respiratory System Quiz

What is the main function of breathing?

• To digest food

• To regulate body temperature

• To transport oxygen to the body's cells

• To pump blood throughout the body

Which system controls the unconscious process of breathing?

• Nervous system

• Endocrine system

• Respiratory system

• Autonomic nervous system

What happens to the diaphragm and intercostal muscles during inhalation?

• Diaphragm flattens and intercostal muscles contract

• Diaphragm contracts and intercostal muscles relax

• Both diaphragm and intercostal muscles relax

• Diaphragm relaxes and intercostal muscles contract

Where does the vital exchange of gases occur in the lungs?

• Bronchi

• Alveoli

• Trachea

• Bronchioles

What is the function of hemoglobin in the respiratory system?

• Transporting oxygen throughout the body

• Creating energy for the body

• Producing carbon dioxide

• Expelling oxygen from the body

How do the lungs get rid of carbon dioxide?

• Inhale it

• Convert it into oxygen

• Store it in the blood

• Exhale it

What causes the chest cavities to become smaller during exhalation?

• Intercostal muscles contracting

• Diaphragm flattening

• Diaphragm contracting

• Intercostal muscles relaxing

How many times do the lungs inhale and exhale in a minute on average?

• 15-20 times

• 10-15 times

• 5-10 times

• 20-25 times