Control of Ventilation - Physiology and Anatomy - Lecture Slides, Slides for Physiology. Aliah University

Physiology

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
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Control of Ventilation
16-47
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Brain Stem Respiratory Centers
Automatic breathing is
generated by a rhythmicity
center in medulla oblongata
Consists of inspiratory
neurons that drive
inspiration & expiratory
neurons that inhibit
inspiratory neurons
Their activity varies in a
reciprocal way & may be
due to pacemaker
neurons
Insert fig. 16.25
Fig 16.25
16-48
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Inspiratory neurons stimulate spinal motor neurons
that innervate respiratory muscles
Expiration is passive & occurs when inspiratories are
inhibited
Brain Stem Respiratory Centers continued
16-49
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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
Pons Respiratory Centers
16-50
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