BPK 143 Lecture Notes - Lecture 14: Ejection Fraction, Motor Neuron, Viscosity

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 143
• Professor: Anthony Leyland

Document Summary

Pulmonary physiology: trace the route of air from just outside the nose to alveolus. External nares*pharynx*glottis*larynx*trachea*bronchi (1, 2 and 3)* terminal and respiratory bronchioles*alveolar ducts*alveoli: relationship between airway resistance and smooth muscle in the bronchioles. Small, thin walled sacs that have capillary beds in their walls, and there are over 300 million=large sa where gas exchange can take place. Their thinness makes it easier for gases to pass through: how is air conditioned as it enters the respiratory passages. Movement of air results from a pressure difference between pulmonary air and atmosphere. During inspiration, the diaphragm descends and increases v of thoracic cavity and external intercostal muscles contract increasing v as well. Volume, 4 units: tidal v= amount of air that is inspired and expired during a normal breath. Expiratory reserve volume (erv) is the additional amount of air that can be exhaled after a normal exhalation and the inspiratory reserve volume (irv) is the.