20 Questions
What is the result of increased H+, PCO2, and BPG in blood?
Decrease in hemoglobin affinity for O2
What happens to hemoglobin's affinity for oxygen at decreased temperatures?
It increases
What is the effect of heat production on hemoglobin's affinity for oxygen?
It decreases
What is the result of inadequate O2 delivery to tissues?
Hypoxia
What percentage of carbon dioxide is transported dissolved in plasma?
7-10%
What is the result of decreased pH on hemoglobin-O2 bond?
It weakens
What is the term for the shift of the O2-hemoglobin dissociation curve to the right?
Bohr effect
What is the primary site of carbon dioxide transport in the blood?
Red blood cells
What happens to the pH of blood when there is slow shallow breathing?
pH drops
What is the role of bicarbonate ions in the plasma?
They act as a buffer to control blood pH
What happens to carbon dioxide in the lungs?
It dissociates from carbaminohemoglobin and is exhaled
What is the result of the chloride shift in the lungs?
Bicarbonate ions diffuse back into the red blood cell, and chloride ions diffuse out of the red blood cell
What is the role of carbonic anhydrase in the transport of carbon dioxide?
It catalyzes the breakdown of carbonic acid into carbon dioxide and water
What happens to the hydrogen ions in the red blood cell in the lungs?
They are released from hemoglobin and combine with bicarbonate ions
At what point does arterial PO2 need to drop for peripheral chemoreceptors to respond?
Below 60 mm Hg
What triggers peripheral chemoreceptors to send nerve impulses to respiratory centers despite normal PCO2?
Low PO2
What is the effect of hyperventilation on PCO2 levels?
Lowers PCO2
How does a decrease in PCO2 during hyperventilation affect pH?
Increases pH
What is the effect on peripheral chemoreceptors when pH is high?
Send fewer impulses to respiratory centers
How does hyperventilation initially affect breathing rate and depth?
Increases breathing rate and depth
This quiz tests your understanding of how bicarbonate ions regulate blood pH and the role of CO2 in blood pH control. Learn about the importance of HCO3 and H2CO3 in maintaining blood pH balance.
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