PSIO 420 Study Guide - Midterm Guide: Simple Squamous Epithelium, Respiratory System, Serratus Anterior Muscle
20 Jan 2014
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Document Summary
Ventilation - moving air in and out of the lungs which allows for external respiration ph regulation - removal of co2 and how it contributes to acid/base balance. Respiration: external vs. internal: external - diffusion of gasses from tissues to blood in the lungs. Internal - diffusion of gasses from blood to tissues in the muscles, skin, organs. We do it to get gas exchange so that aerobic respiration can be performed. Key point: respiratory system is not limiting factor during exercise! Diameter decreases as you move from top to bottom. Length also decreases moving from top to bottom, with the alveoli being 1/3 mm. The number of each increased moving from top to bottom, causing the number of alveoli to be about 300 million. Lastly total cross sectional area decreased from 0 to 3, however increased from 3 to 24. The alveoli was about 50 -100m2 in total cross sectional area.
