General Biology · free preview
Chapter 39: The Respiratory System
Breathing is an involuntary event. How often a breath is taken and how much air is inhaled or exhaled are tightly regulated by the respiratory center in the brain.
1. Chapter 39: The Respiratory System
Chapter 39: The Respiratory System
2. Key terms check
Which key term matches this definition?
partial pressure of oxygen in the alveoli (usually around 100 mm Hg)
3. Key terms check
Which key term matches this definition?
duct that extends from the terminal bronchiole to the alveolar sac
4. Key terms check
Which key term matches this definition?
structure consisting of two or more alveoli that share a common opening
5. Key terms check
Which key term matches this definition?
how much air is in the alveoli
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