The alveolar and intrapleural pressures are dependent on certain physical features of the lung. The major mechanisms that drive pulmonary ventilation are atmospheric pressure ( P atm) the air pressure within the alveoli, called alveolar pressure ( P alv) and the pressure within the pleural cavity, called intrapleural pressure ( P ip). Pulmonary ventilation is the act of breathing, which can be described as the movement of air into and out of the lungs. Discuss factors that can influence the respiratory rate.Describe the respiratory centers of the pons.Describe the respiratory centers of the medulla oblongata.Outline the mechanisms behind the control of breathing.Discuss the meaning of respiratory volume and capacities.Discuss the physical factors related to breathing.List the steps involved in pulmonary ventilation.Discuss how pressure, volume, and resistance are related.Describe the mechanisms that drive breathing.( physiology ) The sum of the parallel and the serial dead spaces.By the end of this section, you will be able to:.( physiology ) The sum of the anatomic plus the alveolar dead spaces.Because this is a functional measurement, the volume is called the physiologic dead space. Lippincott Williams & Wilkins Ninth edition.īohr's method measures the volume of the lung which does not eliminate CO 2. West, Respiratory Physiology: The Essentials. ( physiology ) That volume of air in the lung that does not eliminate carbon dioxide, as defined functionally by the Bohr equation.( physiology ) That volume of air in the lung which does not partake in gas exchange. Throughout this paper, the term physiological dead space will be used to refer to the volume of the conducting airway down to the location at which a large change in gas composition occurs. This definition became inadequate once the alveolar dead space was described.
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