BIO 188 Study Guide - Respiratory System

BIO 188 Study Guide - Respiratory System - BIO 188 Study...

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BIO 188 Study Guide #16 RESPIRATORY PHYSIOLOGY Study Questions 1. How is gas diffusion between the lung and the blood maximized? Increased surface areas for gas exchange, maximizing partial pressure gradients across surfaces, minimizing exchange surface thickness 2. What are the principal functions of the respiratory system? 3. Name the different cell types in the lung and their function. Type I (exchange surface w/ capillaries), Type II (make surfactant that reduce surface tension) 4. How is air taken into the lungs during inhalation? Diaphragm contraction creates negative pressure in thoracic cavity 5. How is air expelled from the lungs during exhalation? Diaphragm relaxation increases pressure in thoracic cavity 6. What determines whether inhalation or exhalation occurs? The contraction of the diaphragm and pressure in thoracic cavity and pressure in intercostal muscle 7. What is the shape of the diaphragm when it is relaxed? A dome 8. Which cells in the lung produce surfactant and what is the purpose of surfactant? Type II cells, surfactant coats alveoli to reduce surface tension 9. Distinguish between external respiration and internal respiration. External is between blood and lungs, internal is blood and tissues 10. What is tidal volume? What is the normal tidal volume?
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This note was uploaded on 10/25/2010 for the course BIO 188 taught by Professor Capco during the Spring '08 term at ASU.

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BIO 188 Study Guide - Respiratory System - BIO 188 Study...

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