BPK 142 Study Guide - Final Guide: Pulmonary Circulation, Diffusing Capacity, Respiratory Minute Volume

• School: Simon Fraser University
• Department: Biomedical Physio & Kines
• Course: BPK 142
• Professor: Craig Asmundson

Document Summary

Respiratory system nose, pharynx, larynx, trachea, bronchi and legs. Bronchi primary and tertiary: terminal and respiratory bronchioles alveolar ducts alveoli, branching, supportive cartilage is gradually replaced by smooth muscle. Contraction and relaxation of the smooth muscle constricts or dilates the bronchioles major effects on airway resistance. Conducting airways lead inspired air to the alveoli: volume of conducting airways = anatomic dead space (vd) 150 ml. Small thin walled sacs that have capillary beds in their walls; site of gas molecule (o2 & co2) exchange between air and blood; millions. Alveolar-capillary membranes that separate air molecules into the alveoli from the blood into the capillaries. Large surface area 70 square meters, size of a tennis court. Contain conducting airways, alveoli, blood vessels and elastic tissue. Molecules move from areas of high pressure to areas of low pressure (diffusion) Boyle"s law the pressure of gas is inversely proportional to its volume.