26 Regulation of breathing

26 Regulation of breathing - Biology141(Physiology 1:15 AM...

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Biology141 (Physiology) Page 1 of 3 https://courses.bio.psu.edu/spring2008/biol141/Lecture%2026(2008).htm Biology141 (Physiology) Lecture 26 M. Whim REGULATION OF BREATHING [1]. BACKGROUND. the cardiac cycle and ventilation are 2 rhythmic processes. are the pacemakers different? breathing is controlled at an unconscious and a conscious level. this involves 2 parts of the brain (medulla oblongata and cerebral cortex). do these regions also control the cardiovascular system? [2]. CONTROL OF BREATHING BY THE CNS. (a). Unconscious control of breathing. by neurons in the brainstem (medulla oblongata and pons). the medulla oblongata has a rhythmicity center that contains 2 populations of neurons: 1. Inspiratory neurons. fire during inspiration. how does the activity of these neurons control breathing? 2. Expiratory neurons. fire during expiration. how does the activity of these neurons control breathing? (remember expiration is a passive process).
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26 Regulation of breathing - Biology141(Physiology 1:15 AM...

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