a problem about cardiac control

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allanwong46
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a problem about cardiac control

Post by allanwong46 » Sat Apr 01, 2006 4:18 am

hello,everyone!pls help me to answer a few questions. :roll:

1. Increased blood pressure is detected by stretch receptor or baroceptor??
2.will increased CO2 concentration leads to the increased output of sympathetic nervous system to increase the heart rate?
(I am confused about this because someone said it is not an actual mechanism as arterial CO2 concentration stays relative constant..
but my textbook said that CO2 concentration is a factor to increase heart rate..)
3.Or..CO2 concentration only affect the breathing rate?Since dissolved CO2 lead to formation of carbonic acid and decreased pH is detected by chemoreceptor in aortid and carotid bodies..

thx a lot!

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MrMistery
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Post by MrMistery » Sun Apr 02, 2006 7:27 pm

1.Both i think... How exactly do you define a strech receptor?
2. Your book is correct.
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