2026\2027
In which part of the lungs does gas exchange occur?
- correct answer 1. does not occur
2. occurs
3. does not occur
4. does not occur
Label the parts of the respiratory system.
- correct answer 1. epiglottis
2. trachea
3. primary bronchus
4. secondary bronchus
5. alveolar duct
6. alveoli
7. diaphragm
8. bronchioles
Which best describes the way oxygen and carbon dioxide move between the alveoli and capillaries?
- correct answer Gases move from a high pressure and concentration to a low pressure and
concentration.
What do we already know about oxygen? Select all that apply.
- correct answer Oxygen is vital for cellular metabolism.
Oxygen is exchanged for carbon dioxide in the lung alveoli.
Hemoglobin is the transport vehicle for oxygen.
Each hemoglobin molecule is limited by the amount of oxygen it can carry.
,Drag the steps to the correct locations in the way gas exchange occurs.
- correct answer 1. Breathe in (O2 in)/Breathe out (CO2 leaves)
2. O2 rich blood transported to cells
3. Gases exchanged: O2 enters cells, CO2 leaves cells
4. CO2 rich blood transported to lungs4
Drag and drop each cause of impaired gas exchange into the associated problem category.
- correct answer Ventilation Problem:
Muscle weakness
Tongue blocking airway
No air
Perfusion Problem:
Carbon monoxide poisoning
Blood loss
Sickle cell disease
When gas exchange is impaired, the body compensates. - oxygen levels in the arterial blood signal the
body to - respirations, blood pressure, and heart rate so quicker gas exchange can occur.
- correct answer decreased
increase
Which actions will help prevent gas exchange problems in the future? Select all that apply.
- correct answer Walking a mile at a fast pace
Reading the warnings and following them when using bleach
Getting an influenza shot yearly
Which of the following suggests a gas exchange problem? Select all that apply.
- correct answer Smoker
Cough
, Shortness of breath
Cyanosis
Which of the following can cause alterations in gas exchange? Select all that apply.
- correct answer Blockage in the blood traveling away from the lung
Blockage of air traveling into the lung
Inability for oxygen to diffuse across the capillaries and into the red blood cell
Inability for carbon dioxide to diffuse across capillaries and into the alveoli
Inability for air to be exhaled from the lung
Which findings are indicators of alterations in gas exchange? Select all that apply.
- correct answer Loss of consciousness
Low oxygen saturation
Confusion
Which actions will help prevent gas exchange problems in the future? Select all that apply.
- correct answer Smoking cessation
Getting vaccinated against COVID-19
Learning to swim
Avoiding high levels of outdoor air pollution
Using an air purifier indoors
Which are homeostatic mechanisms used by the body when there is a gas exchange problem? Select all
that apply.
- correct answer Changing the pH of the blood
Forcing respiratory muscles to work harder
Increasing respiratory rate
A - problem is when there is not enough oxygen being collected. A - problem is when something is
preventing oxygen from getting from the alveoli to its destination. - is a perfusion problem and - a
ventilation problem.
- correct answer ventilation