Lab_37_HWanswers - Exercise 37A Homework Respiratory System...

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Exercise 37A Homework Respiratory System Physiology 1. What is the definition of inspiration Air taken into the lungs. Breathing in. to inhale 2. Name the inspiratory muscles in quite breathing. External Intercostals and diaphragm. 3. Summarize the process of inspiration and mention whether it is active or passive process As the inspiratory muscles contract the size of the thoracic cavity increases. The diaphragm moves downward and flattens. The external Intercostals muscles raise the ribs increasing the size of the thoracic cavity. Gas enters to fill the expanded space due to a decrease in thoracic pressure. It is an active process. 4. What is the definition of expiration Air passes out of the lungs. Breathing out. To exhale 5. Name the expiratory muscles in quite breathing Internal intercostal; muscles 6. Summarize the process of expiration and mention whether it is active or passive process. The inspiratory muscles relax and the elastic lung tissue recoils. This decreases the thoracic volume and increases the pressure in the thoracic cavity. The air is forced out to the lungs until equilibrium It is a passive process. 7. What is auscultation Listening to the internal sounds of the body by using a stethoscope. 8. Describe bronchial sounds, and where you can here the sounds A normal sound heard with a stethoscope over the main airways of the lungs, especially the trachea. 9. Describe vesicular sounds, and where you can here the sounds Vesicular breath sounds consist of a quiet, wispy inspiratory phase followed by a short, almost silent expiratory phase. They are heard over the periphery of the lung field 10. Describe rales. Crackles, crepitations, or rales are the clicking, rattling, or crackling noises that may be made by one or both lungs of a human with a respiratory disease during inhalation. They are often heard only with a stethoscope Bilateral crackles refer to the presence of crackles in both lungs.
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