BPK 142 Study Guide - Midterm Guide: Chronic Obstructive Pulmonary Disease, Electronvolt, Vital Capacity

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Vital capacity the maximum amount of air that can be inhaled or exhaled from the lung. Fev1. 0 forced expiratory volume in 1 second the volume of air expired during the first 1. 0 seconds of a forced vital capacity maneuver; helpful in determining the amount of lung obstruction. Maximal breathing capacity the max volume of air which may be breathed during maximum effort: asthma and chronic bronchitis (obstructive lung diseases): Asthma bronchial tubes are extra sensitive, therefore becoming inflamed and produce excess mucus. The muscles around the airways tighten making the airways narrower. During an acute attack, the airways narrow further due to bronchospasm increased airway resistance. Chronic bronchitis inflammation and irritation of the airways (bronchial tubes) of the lungs: vital capacity due to constricted bronchioles, fev1. 0 , fev1. 0/fvc ratio , maximal breathing capacity , pneumonia and pulmonary fibrosis (restrictive lung diseases):