Anatomy > STUDY GUIDE > West Coast University ANAT 260 Physiology PGA 5 Study Guide for Chapters 17-20. (All)

West Coast University ANAT 260 Physiology PGA 5 Study Guide for Chapters 17-20.

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1. WHAT ARE THE FOUR PRIMARY FUNCTIONS OF THE LUNG? a. Exchange of gases between the atmosphere and the blood. - The body brings in O2 for distribution to the tissues and eliminates CO2 waste produc... ed by metabolism. b. Homeostatic regulation of body pH. - The lungs can alter body pH by selectively retaining or excreting CO2. c. Protection from inhaled pathogens and irritating substances. - Like all other epithelia that contact the external environment, the respiratory epithelium is well supplied with defense mechanisms to trap and destroy potentially harmful substances before they can enter the body. d. Vocalization. - Air moving across the vocal cords creates vibrations used for speech, singing, and other forms of communication. 2. WHAT ARE THE MUSCLES THAT CONTROL BREATHING, BOTH INSPIRATION AND FORCED EXPIRATION? 3. FOLLOW THE PATH OF AIR INTO THE LUNG BY LISTING EVERY STRUCTURE. WHAT IS THE CONDUCTING PORTION AND WHICH ONE IS THE RESPIRATORY FUNCTION? IN THE SAME PATH DIFFERENTIATE THE UPPER RESPIRATORY FROM THE LOWER RESPIRATORY TRACT. 4. EXPLAIN HOW BOYLE’S LAW AND DALTON’S LAW FACTOR INTO RESPIRATION AND GAS EXCHANGE. HINT: PRESSURE CHANGES AND RESISTANCE ARE EXPLAINED A LITTLE FURTHER IN THE CHAPTER. a. Boyle’s law states that as the volume available to a gas increases, the gas pressure decreases. The body creates pressure gradients by changing thoracic volume. [Show More]

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