Respiratory System Anatomy and Physiology

What is the primary function of the respiratory system?

• To digest food

• To circulate blood

• To exchange gases

• To filter waste from the blood

Which structure is the site of gas exchange in the lungs?

• Trachea

• Bronchi

• Alveoli

• Larynx

What muscle contracts to initiate inhalation?

• Pectoralis major

• Diaphragm

• Intercostal muscles

• Abdominal muscles

Which of the following gases is expelled from the body during exhalation?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

What is the role of the nasal cavity in the respiratory system?

• To produce sound

• To exchange gases

• To warm, moisten, and filter air

• To transport air to the lungs

Which part of the respiratory system is also part of the digestive system?

• Larynx

• Pharynx

• Trachea

• Bronchi

What is the correct pathway of air entering the body through the respiratory system?

• Nasal cavity → Larynx → Trachea → Bronchi → Alveoli

• Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Alveoli

• Nasal cavity → Trachea → Larynx → Bronchi → Alveoli

• Nasal cavity → Pharynx → Trachea → Larynx → Bronchi → Alveoli

What is the primary driving force for gas exchange in the alveoli?

• Blood pressure

• Muscle contraction

• Diffusion gradient

• Active transport

Which of the following is NOT a function of the respiratory system?

• Gas exchange

• Blood filtration

• Sound production

• Regulation of blood pH

What structure prevents food and liquid from entering the trachea?

• Uvula

• Epiglottis

• Vocal cords

• Esophagus