3.26.18.docx - Carbon Dioxide Transport Bicarbonate is a...

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Carbon Dioxide Transport - Bicarbonate is a Major buffer, typically buffers lactic acid and hydrogen ions - This reaction allows you to pick up/get rid of extra hydrogen ions - Accumulation of h ions during exercise is called metabolic acidosis (the making of acid due to result of metabolism) - Exhaling more co2. - One of the primary reasons we increase breathing is to help this reaction - End result is co2 and water Dynamics of Pulmonary Control Respitorary centers both in medulla and pons Ventilatory Control -Phrenic nerve is responsible for signaling diaphragm (involuntary muscle) whether to descend or ascend. (receives input from the medulla and pons) -Other skeletal muscle are intercostals (voluntary) Influences on Breathing - Chemoreceptors found in carotid arteries, extremely sensitive to co2 - Stretch- (Hering- Breur reflex) this reflex is to prevent your lungs from over inflating. Senses stretch in the lungs and when you have reached your max stretch of lungs and tells diaphragm to exhale.
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