BIOL 153 Lecture Notes - Lecture 6: Peripheral Chemoreceptors, Vagus Nerve, Baroreceptor
Document Summary
O2 compare and contrast the influences of the following factors on respiratory rate depth of breathing: lung reflexes, emotions, arterial ph, and partial pressures of and co2 in arterial blood. Respiratory pressures are always described in relation to atmospheric pressure (the pressure exerted by the gases surrounding the body), which is. Intrapulmonary pressure is the pressure within the alveoli of the lungs b it fluctuates during the process of breathing but always equalizes itself with the atmospheric pressure. Intrapleural pressure is the pressure within the pleural cavity b it fluctuates with breathing but is always about 4 mm hg less than intrapulmonary pressure therefore it is always negative relative to intrapleural and atmospheric pressures. Note: since each lung is in a separate pleural cavity, one lung can collapse while the other remains unaltered pneumothorax refers to the presence of air in the intrapleural space.
