When chemoreceptors in the vascular system of humans detect a slight decrease in pH, this means that __________ concentrations have increased, and the breathing rate must __________. oxygen; increase carbon dioxide; increase oxygen; decrease carbon dioxide; decrease chloride; decrease
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The chemoreceptors in the vascular system of humans detect a decrease in carbon dioxide levels. Show more…
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A decrease in the pH of human blood caused by exercise would decrease breathing rate decrease cardiac output decrease the amount of O2 unloaded from haemoglobin decrease the affinity of haemoglobin for oxygen
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ANSWER THE FOLLOWING QUESTIONS: 1. Central chemoreceptors are located in the __________ and they detect changes in __________ and __________. Of these, the concentration of __________ is the most closely monitored. Respiration is increased when the levels of __________ become too high. 2. Peripheral chemoreceptors are located in the __________ and __________ where they monitor blood __________, __________ and __________ concentrations. When arterial O2 concentration falls below __________ mmHg, higher respiration will be triggered. 3. What happens to arterial PCO2 and PO2 during the breath hold? 4. Which factor (O2 or CO2) has a stronger effect on BH time? (Hint: central chemoreceptors detect changes in what?) 5. Define the following terms: - Hyperventilation: - Hypoventilation: - Hypercapnia: - Hypoxia:
What effect will the following changes in hemoglobin affinity have on O2? Explain. An increase in partial CO2 pressure in the lungs from 3 kPa to 6 kPa. A decrease in BPG levels from 9 mM to 4 mM. An increase in blood pH from 7.1 to 7.4.
Sukhada S.
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