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Title: Ventilation pattern Post by: puffin0516 on Nov 20, 2011 QUESTION:
Patients with severe uncontrolled diabetes mellitus produce above normal levels of acids. Outline the normal homeostatic pathway for control of ventilation. What are the stimuli, receptors and control centers in the brain? What is the effector? Predict the ventilation pattern in patients with uncontrolled diabetes mellitus and whether arterial pO2 and pCO2 increase or decrease and why. is this answer correct?? ANSWER Since you have a LOT of acid in your blood (metabolic acidosis), your body will try to compensate by removing acid. One way it does this is by removing CO2 from your body (because when CO2 meets H2O, they can become carbonic acid). The chemoreceptors in your body will sense the increase in acidity, and send a message to your respiratory center telling it to make you breathe faster. When you breathe faster, you'll blow out more CO2, resulting in a decrease in PCO2. PO2 as far as I know shouldn't really change much because your blood is pretty good at completely saturating itself. If anything, it may increase a little. Title: Re: Ventilation pattern Post by: how_mendel on Nov 20, 2011 Since you have a LOT of acid in your blood (metabolic acidosis), your body will try to compensate by removing acid. One way it does this is by removing CO2 from your body (because when CO2 meets H2O, they can become carbonic acid). The chemoreceptors in your body will sense the increase in acidity, and send a message to your respiratory center telling it to make you breathe faster. When you breathe faster, you'll blow out more CO2, resulting in a decrease in PCO2. PO2 as far as I know shouldn't really change much because your blood is pretty good at completely saturating itself. If anything, it may increase a little. True, but attempt to use the words exhale and inhale rather than words like "blow out". Otherwise it sounds correct. |