BIO310H5 Lecture Notes - Lecture 14: Lung Volumes, Bronchiole, Medulla Oblongata
Document Summary
This region receives input from many other neural centres that increase or decrease the rhythm (eg voluntary control of breathing) Sensors: central chemoreceptors, part of medulla oblongata respiratory centre, respond to changes in. [h+] in the brains ecf (these changes result from changes in blood. Stimulated by: po2, pco2 most likely changes in ph, [h+] Air breathing consists of the reciprocal movement of air into and out of the lungs (tidal flow) , whereas water breathing consist of unidirectional flow of water over gills. Anatomic dead space: the air that remains in respiratory passageways cannot be used in our bodies and is exhale unchanged. Physiologic dead space: if part of the lung is damaged and gas exchange cannot happen there-- air still goes there, but cannot be used; it also includes the anatomic dead space volume. In general, the area of respiratory surfaces in mammals increases with body weight and rate of oxygen reuptake.
