Respiratory System Practice Test

Which gas enters the alveoli of the lungs from the capillaries?

• Carbondioxide

• Nitrogen

• Hydrogen

• Oxygen

During inhalation, what happens to the movement of the diaphragm?

• Contracts and moved down

• Contracts and move up

• Relaxes and move up

• Relaxes and moved down

What is the role of the epiglottis in the breathing mechanism?

• Regulate blood flow

• Prevent food from entering the trachea

• Enhancing gas exchange

• Assist in vocalization

What is the primary function of the respiratory system?

• Digestion

• Circulation

• Respiration

• Excretion

Which respiratory structure contains the vocal cords?

• Larynx

• Pharynx

• Trachea

• Epiglottis

Where does gas exchange between the respiratory system and the circulatory system occur?

• Bronchi

• Alveoli

• Trachea

• Larynx

What is the role of cilia in the respiratory system?

• Gas exchange

• Mucus production

• Moving particles out of the respiratory tract

• Oxygen storage

During exhalation, what happens to the volume of the chest cavity?

• Increases

• Decreases

• Remains constant

• Fluctuates

Which of the following is the correct sequence of respiratory passages?

• Trachea, bronchi, bronchioles, alveoli

• Alveoli, bronchioles, bronchi, trachea

• Bronchi, trachea, alveoli, bronchioles

• Trachea, bronchioles, alveoli, bronchi

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

• Trachea

• Bronchioles

• Pharynx

• Alveoli