3.Lung Volumes_FullNotes-2 - Lung Volumes and Pulmonary...

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Lung Volumes and Pulmonary Function Tests KIN 411 Reading: ACSM Guidelines Ch. 3 CP: 15-21, 102-103, 140-146
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Overview Respiration (KIN 310 review) Lung Volumes Gas Laws
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WHY DO WE BREATHE?
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KIN 310 REVIEW!!! WHY DO WE ALL BREATHE? Take IN oxygen (O 2 ) Why? Make ATP Where do we use O 2 ? Electron Transport Chain Get RID of carbon dioxide (CO 2 ) Where is CO 2 produced? Krebs Cycle and Lactic Acid Buffer Why do we need to get rid of it? Disrupts pH balance of blood
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KIN 310 REVIEW!!! Respiration is the MAIN function of the pulmonary system Four separate processes 1. Pulmonary Ventilation 2. Pulmonary Diffusion 3. Transport of O 2 and CO 2 via the blood 4. Capillary Diffusion
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Process of respiration Pathway of air: Mouth and nose Air warming and moistening Trachea Bronchi Bronchioles Alveoli Gas exchange surface Diffusion of O 2 into blood (Fick’s Law)
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Obstructive Disease Difficult to get air out of the lungs Obstruct expiration Examples: Emphysema Chronic bronchitis Asthma Chronic obstructive pulmonary disease (COPD) Example: blow air out of straw
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Restrictive Disease Difficult to get air into the lungs “Restrict” inspiration Examples: Chronic Heart Failure Pulmonary Fibrosis Sarcoidosis Muscular diseases Chest wall deformities Cracked ribs Example: belt around chest, try to inhale
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Exercise and respiration Rate (breaths/min) Depth (L/breath) Which increases first with exercise?
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Lung Volumes and Pulmonary Function “I’m out of breath!” Not usually a limiting factor for exercise performance in healthy individuals May affect those with acute or chronic respiratory disorders Main determinant is size, particularly height
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Lung Function
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Measuring vital capacity and its subcomponents…volumes Use a spirometer.
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  • Spring '08
  • OKA
  • IRV, FRC, basic lung

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