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Physiology of the Respiratory System

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Questions and Answers

What is the function of lung surfactant?

Prevent oxygen from entering the bloodstream
Increase the surface tension at the alveoli
Facilitate gas exchange by decreasing surface tension (correct)
Decrease the surface area of the alveoli

What is the main cause of wheezing in individuals with asthma?

Increased oxygen levels in the bronchi
Inflammation of the bronchi causing them to widen
Narrowing of the bronchi due to inflammation (correct)
Reduced oxygen intake by the alveoli

How does cystic fibrosis affect the respiratory system?

It clogs the trachea and bronchi with excess mucus (correct)
It causes the bronchi to widen due to excessive mucus
It reduces mucus production in the trachea and bronchi
It increases oxygen intake by clearing air passageways

What is a common symptom of emphysema?

Development of large air pockets in the lungs (B) Signup and view all the answers

How does COPD affect individuals who have it?

Results in blockages in the respiratory system (B) Signup and view all the answers

What happens when carbon dioxide reaches the alveoli?

It goes through a process to be expelled from the body (B) Signup and view all the answers

Why is wheezing a common symptom of asthma?

Resulting from inflamed bronchi narrowing (B) Signup and view all the answers

What is the role of the diaphragm during exhalation?

It contracts to push air out of the lungs (D) Signup and view all the answers

'Chronic obstructive pulmonary disease (COPD)' includes which conditions as part of its group?

'Emphysema' and 'bronchitis' (B) Signup and view all the answers

'Gas exchange' at the alveoli primarily involves which process?

'Oxygen leaves from capillaries' (D) Signup and view all the answers