Kinesiology 2230A/B Study Guide - Midterm Guide: Intrapleural Pressure, Acidosis, Rib Cage

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

Document Summary

Lecture 1: system is involved in the uptake portion of vo2, trying to take air from the environment and get air into the bloodstream. Lungs get smaller and rib cage is pulled in: pressure increase when lungs inflate and inhale air. Mechanics of ventilation: capillaries are interwoven within and around the alveoli and gas exchange occurs between capillaries and alveoli junction, action of diaphragm and costal muscles affects intrapleural and intrapulmonary pressures leading to inspiration and expiration. Inter pleural pressure (always present between lung/rib cage: always lower than patm, even though there are fluctuations during inspiration and expiration there is always a negative pressure relative to patm. Alveolar volume = [tidal volume dead space] x frequency = ve - Lung volumes: trachea = dead space, tidal volume at rest: very small portion, expiratory reserve volume = what is left at the expiration.