Respiratory Structure and Function Quiz

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The site of efficient gas exchange in the lung is the:

Pulmonary vein

Pulmonary capillaries

Pulmonary artery

Alveoli (correct)

How many capillaries are there per alveolus?

200-400

500-1000 (correct)

50-100

1000-1500

The shape of alveoli is primarily:

Cylindrical

Spherical

Polygonal (correct)

Cubical

Which of the following allows collateral ventilation in the lung?

Pores of Kohn Signup and view all the answers

What may cause the pores of Kohn to become enlarged?

Emphysema Signup and view all the answers

The openings that allow communication between bronchioles and alveoli include:

Interbronchiolar channels (of Martin) Signup and view all the answers

Which component allows for the movement of the lung root during inspiration?

Pulmonary ligament Signup and view all the answers

What is the primary role of the muscles of respiration in the chest wall?

To move the diaphragm and rib cage for breathing Signup and view all the answers

What is the main function of the conducting airways in the respiratory system?

Humidifying the inhaled air Signup and view all the answers

Which structure in the nasal cavity is responsible for producing turbulent airflow and collision of particles with mucus?

Turbinates Signup and view all the answers

What is the primary function of the respiratory system in relation to gas exchange?

Supplying metabolic needs of tissues with oxygen Signup and view all the answers

What does the pulmonary defense mechanism in the respiratory system involve?

Coughing and sneezing reflex responses Signup and view all the answers

What is the main function of alveoli in the respiratory system?

Transporting oxygen to the body's tissues Signup and view all the answers

What opposes the tendency of alveoli to collapse when compressed?

Interdependence of alveolar arrangement Signup and view all the answers

What is responsible for maintaining alveolar patency by reducing surface tension?

Thin layer of surfactant on the inner surface of alveoli Signup and view all the answers

How does the respiratory system contribute to vocalization?

By opening and closing vocal cords to control airflow Signup and view all the answers

What allows for the exchange of fresh oxygen for CO2 produced by cells of the body?

'Gas exchange' at the capillaries Signup and view all the answers

What is responsible for humidifying and warming inhaled air in the respiratory system?

'Mucous glands and cells' in conducting airways Signup and view all the answers

What is a key component involved in filtration of inhaled air in the respiratory system?

Production of mucus by mucous glands and cells Signup and view all the answers