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14 Cards in this Set
- Front
- Back
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Chemoreceptors usually act to _________________
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increase heart rate & blood flow
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Where is the central chemoreceptors located?
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In the brainstem
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What are the Central Chemoreceptors most sensitive to?
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CO2 levels
==>as a non polar gas crosses the blood brain barrier |
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What is it called when CO2 levels are too high?
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Hypercapnia
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What is it called when CO2 levels are too low?
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Hypocapnia
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What can cause Hypercapnia?
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many disorders
-asthma -COPD |
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What will happen to breathing with hypercapnia?
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breathing rate increases
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What can cause hypocapnia?
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stress induced
hyperventilation |
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Where are the peripheral chemoreceptors located?
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Aortic & Carotid bodies
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What are the peripheral chemoreceptors most sensitive too?
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-changes in O2 levels
-pH levels in blood |
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How sensitive are the peripheral chemoreceptors?
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Not very sensitive
==>need a large drop in O2 to activate |
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How sensitive are the peripheral chemoreceptors?
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Not very sensitive
==>need a large drop in O2 to activate |
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What is the body most sensitive too?
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changes in CO2
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What is Hypoxic drive?
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Disorder ==> patients with chronic lung disorders trap and accumulate large amounts of CO2
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