What is the primary function of the respiratory system?

• To circulate blood throughout the body

• To exchange gases between the body and the environment

• To digest food

• To produce hormones

Which structure is responsible for the actual exchange of gases in the lungs?

• Trachea

• Bronchi

• Alveoli

• Diaphragm

Which of the following is part of the upper respiratory tract?

• Larynx

• Bronchi

• Alveoli

• Diaphragm

What is the main muscle involved in the process of inhalation?

• Intercostal muscles

• Diaphragm

• Abdominal muscles

• Pectoral muscles

Which of the following best describes the function of intercostal muscles?

• They help in the digestion of food

• They assist in the movement of the diaphragm

• They aid in the expansion and contraction of the rib cage during breathing

• They are involved in the circulation of blood

What is the primary difference between the conductive and respiratory zones of the respiratory system?

• The conductive zone is involved in gas exchange, while the respiratory zone is not

• The respiratory zone is involved in gas exchange, while the conductive zone is not

• Both zones are involved in gas exchange

• Neither zone is involved in gas exchange

Which of the following structures is NOT part of the lower respiratory tract?

• Trachea

• Bronchi

• Pharynx

• Alveoli

What role does the diaphragm play during exhalation?

• It contracts to increase the volume of the thoracic cavity

• It relaxes to decrease the volume of the thoracic cavity

• It contracts to decrease the volume of the thoracic cavity

• It relaxes to increase the volume of the thoracic cavity

Which of the following is a characteristic of the alveoli that facilitates efficient gas exchange?

• Thick walls

• Large surface area

• High blood pressure

• Low oxygen concentration

What is the primary function of the nasal cavity in the respiratory system?

• To exchange gases

• To filter, warm, and humidify incoming air

• To produce sound

• To store oxygen