Kinesiology 2230A/B Study Guide - Bicarbonate Buffer System, External Intercostal Muscles, Pulmonary Pleurae

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2230A/B
• Professor: Glen Belfry

Document Summary

This system is involved in the uptake portion of vo2. As involved in the removal of co2. Important in acid-base status (co2 + h: bicarbonate buffering system. Exchange of gas between lungs and blood happens only at alveoli. Dead space = everywhere where gases are not being exchanged. Air in through nose to mouth, pharynx, larynx, trachea, bronchioles dead space. Respiratory bronchioles and alveoli = gas exchange. Lungs simply improve on simple diffusion (o2 in, co2 out) They are suspended in pleural sacs: have double wall: parietal pleura lines thoracic wall and visceral pleura lines out aspects of lungs. Pressures inside the lungs are known as intrapulmonary. Pressures outside the lungs but inside the thorax are known as intrapleural. Between plueral sac and thoracic cage has fluid film that reduces friction during respiratory movement. Action of diaphragm and costal muscles affects intrapleural and intrapulmonary pressures leading to inspiration and expiration.