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Respiratory System: Gas Exchange and Alveoli Structure

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Respiratory System: Gas Exchange and Alveoli Structure

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Questions and Answers

Which of the following structures is responsible for directing air into the lungs?

Bronchioles

Pharynx

Bronchi

Trachea (correct)

What is the primary function of the alveolar ducts?

To divide into alveolar sacs and eventually into alveoli (correct)

To filter out dust and bacteria from the inhaled air

To transport oxygen from the lungs to the heart

To sense the partial pressure of oxygen in the air

What is the name of the sac where gas exchange takes place in the lungs?

Pulmonary capillaries

Alveolar sac (correct)

Thoracic cavity

Respiratory bronchioles

What is the pathway of air inhaled through the mouth or nose?

Trachea, bronchi, bronchioles, alveolar ducts, alveoli Signup and view all the answers

What is the term for the smallest airways in the lungs?

Bronchioles Signup and view all the answers

What is the function of the pulmonary capillaries in the lungs?

To facilitate gas exchange between the alveoli and the blood Signup and view all the answers

What is the point at which oxygen molecules move through a single layer of lung cells?

Individual alveolus Signup and view all the answers

What is the structure that connects the trachea to the lungs?

Bronchi Signup and view all the answers

What is the function of the pharynx in the respiratory system?

To direct air into the lungs Signup and view all the answers

What is the name of the tube that connects the throat to the lungs?

Trachea Signup and view all the answers