BPK 142 Lecture Final 366 Questions with 100% Correct Answers | Verified | Latest Update|75 Pages

what does the respiratory system consist of? - ️️nose, pharynx, larynx, trachea, bronchi, lungs Bronchi - ️️primary, secondary, tertiary bronchi → terminal + respiratory bronchioles → alveolar ducts → alveoli What is a major effect on airway resistance? - ️️Contraction + relaxation of smooth muscle on bronchioles constricts or dilates → effects airway resistance conducting airways - ️️- mouth, trachea, bronchioles - conduct gas to the alveoli, no gas exchange occurs The conducting airways lead ______ air to the ______ - ️️The conducting airways lead inspired air to the alveoli Volume of conducting airways - ️️anatomic dead space (VD) - 150 ml Alveoli - ️️- small, thin walled sacs that have capillary beds in their walls - sites of gas molecule (O2 + CO2) exchange between air + blood Respiratory membrane - ️️alveolar-capillary walls form a membrane that separate the air on the alveolar side from the blood on the capillary side Average thickness of respiratory membrane - ️️0.6 micrometers