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Control of Ventilation - Physiology and Anatomy - Lecture Slides

Slides, Physiology

Post: January 26th, 2013
Description
This lecture is taken from slides of Physiology. Key important points are: Control of Ventilation, Brain Stem Respiratory Centers, Pons Respiratory Centers, Chemoreceptors, Effects of Blood, Brain Chemoreceptors, Pulmonary Receptors, Hering-Breuer Reflex
This lecture is taken from slides of Physiology. Key important points are: Control of Ventilation, Brain Stem Respiratory Centers, Pons Respiratory Centers, Chemoreceptors, Effects of Blood, Brain Chemoreceptors, Pulmonary Receptors, Hering-Breuer Reflex
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Control of Ventilation Docsity.com 16-47 Brain Stem Respiratory Centers • Automatic breathing is generated by a rhythmicity center in medulla oblongata Fig 16.25 – Consists of inspiratory neurons that drive Insert fig. 16.25 inspiration & expiratory neurons that inhibit inspiratory neurons • Their activity varies in a reciprocal way & may be due to pacemaker neurons Docsity.com 16-48 Brain Stem Respiratory Centers continued • Inspiratory neurons stimulate spinal motor neurons that innervate respiratory muscles • Expiration is passive & occurs when inspiratories are inhibited Docsity.com 16-49 Pons Respiratory Centers • Activities of medullary rhythmicity center is influenced by centers in pons – Apneustic center promotes inspiration by stimulating inspiratories in medulla – Pneumotaxic center antagonizes apneustic center, inhibiting inspiration Docsity.com 16-50 Chemoreceptors • Automatic breathing is influenced by activity of chemoreceptors that monitor b..

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