BMS 301 Study Guide - Quiz Guide: Alveolar Cells, Bronchiole, Breathing

• School: Quinnipiac University
• Department: Biomedical Sciences
• Course: BMS 301
• Professor: Thomas Martin

Document Summary

Functions: major function: supply body tissues with o2 and dispose of co2 generated by cellular metabolism, additional functions, homeostatic regulation of ph, protection from inhaled pathogens and irritating substance, vocalization. Defense mechanism: mucociliary escalator, epithelial lining contains cilia that move structures to pharynx to help remove mucus and bacteria. Characteristics and cells found at the alveolar/blood capillary barrier. Role of the different cells found there: type i alveolar cell make up structure of alveoli, type ii alveolar cell make surfactant, alveolar macrophages engulf foreign particles. Importance of thickness of the barrier: the greater the distance between the alveolar and capillary endothelium, the poorer the rate of diffusion. Role of surfactant (see diagram: lowers surface tension, helps prevent lungs from collapsing. Boyle"s law p1v1 = p2v2: compression (decrease volume, increase pressure, expiration diaphragm moves up lungs recoil chest wall moves in, decompression (increase volume, decrease pressure) Inspiration diaphragm moves down lungs expand chest wall moves out.