| Concepts | Questions | Media Resources |
15.1 Respiratory Tract - Air passes through a series of tubes before gas exchange takes place across a very extensive moist surface.
| - Why is it better to breathe through the nose than through the mouth?
Answer
- Why do the alveoli of the lungs remain open, instead of collapsing like a deflated balloon, after exhalation?
Answer
| Essential Study Partner
Gas Exchange Systems
Respiratory Overview
Respiratory Organs General Biology Weblinks
Anatomy & Physiology Labeling Exercises
 The Human Respiratory Tract (38.0K)
The Respiratory Tract - Alveoli (40.0K)
The Upper Respiratory Tract (1) (35.0K)
The Upper Respiratory Tract (2) (34.0K)
Section of Larynx (45.0K)
Glottis Function (35.0K) |
15.2 Mechanism of Breathing - Respiration comprises breathing, external and internal respiration, and cellular respiration.
- During inspiration, the pressure in the lungs decreases, and air comes rushing in. During expiration, increased pressure in the thoracic cavity causes air to leave the lungs.
| - Why does residual volume increase instead of decrease in individuals with certain lung diseases?
Answer
- Explain what is meant by the phrase "humans breathe by negative pressure."
Answer
| Essential Study Partner
Human Breathing
Mechanics of Ventilation
Measuring Function
Control of Respiration Animation Quizzes
Breathing
Respiration |
15.3 Gas Exchanges in the Body - External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses out of the blood.
- Internal respiration occurs in the tissues where oxygen diffuses out of the blood and carbon dioxide diffuses into the blood.
- The respiratory pigment hemoglobin transports oxygen from the lungs to the tissues and aids in the transport of carbon dioxide from the tissues to the lungs.
| - Differentiate between external respiration and internal respiration.
Answer
| Essential Study Partner
Gas Exchange
Gas Transport Animation Quizzes
Hemoglobin
Gas Exchange Case Studies
Breathing Liquids: Reality or Science Fiction? |
15.4 Respiration and Health - The respiratory tract is especially subject to disease because it is exposed to infectious agents.
- Smoking tobacco contributes to three major lung disorders – chronic bronchitis, emphysema, and cancer.
| - Of the lower respiratory disorders discussed in this chapter, which disorders are linked with tobacco smoke?
Answer
| Essential Study Partner
Disorders
Asthma Animation Quizzes
Bronchoscopy
Smoking Risks
Asthma Labeling Exercise
Bronchial and Pulmonary Disorders (39.0K) Case Studies
Smoking Ban
Asthma: The New Worldwide Epidemic |
