bipn 102 review session 2

bipn 102 review session 2 - Pons:Pneumotacic,Apenusic...

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Pons: Pneumotacic, Apenusic Medulla: DRG, VRG Pons inhibits inspiration Regulates inspiratory volume and rate If Pons are destroyed: longer depth of breath occur Cannot limit inspiration Apneustic center: in lower Pons- stimulates inspiration- prolongs inspiration Cerebral cortex- breathing is somewhat voluntary- can hypo/hyper ventilate Cut between spinal cord and medulla- stop breathing Cut between medulla and Pons- irregular breaths maintain rhythm Cut above Pons- normal, depths and rhythm Cut pneumotacic center- long deep breaths Central and peripheral chemo receptors Peripheral works faster- respond to ph o2 co2 Central is slower – responds to pH, indirectly responds to co2 Fig18-19 Vagas nerve is a parasympathetic nerve, it bronchoconstricts – increase mucus  secretion by activating muscarinic receptors Epinephrine bronchiodialates, activates beta2 receptors Frenic nerve- hiccups- hold your breath Graphs
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This note was uploaded on 02/25/2012 for the course ECO 101 taught by Professor Staff during the Fall '10 term at Texas State.

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bipn 102 review session 2 - Pons:Pneumotacic,Apenusic...

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