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Example Questions
Example Question #32 : Homeostasis And The Biological Environment
If a patient's lab values from the doctor's office show a blood plasma pH of 7.1, which of the following could be the correct diagnosis?
Respiratory alkalosis
The results show normal blood plasma pH.
Respiratory acidosis
Metabolic alkalosis
Respiratory acidosis
Normal blood pH is 7.4. A decrease in pH could indicate acidosis, which is associated with too much in the blood. Respiratory acidosis occurs as the result of the lungs failing to eliminate enough
.
Example Question #22 : P H Regulation
What is the concentration in an
solution with a pH of
?
Here is the equation needed to find the correct answer to this question.
Example Question #41 : Homeostasis And The Biological Environment
If a patient's blood becomes acidic, which of the following will occur?
Carbon dioxide levels in the patient's plasma will initially decrease
The patient will hyperventilate
The patient will hypoventilate
Nothing will happen to the patient, as it is normal for the plasma to be acidic
The patient's breathing will remain unchanged
The patient will hyperventilate
The pH of plasma is regulated by the following equilibria:
According to Le Chatlier's Principle, when the concentration of protons increases (plasma becomes acidic) the equilibrium shift will be to the left of the equation. Therefore, there will be an initial increase of carbon dioxide. However, the body needs to rid itself of the excess carbon dioxide. This happens via hyperventilation - the increased breathing out of carbon dioxide.
Example Question #24 : P H Regulation
The bicarbonate buffer system used by the human body is crucial for maintaining physiological pH. The carbonic acid and bicarbonate are the conjugate acid-base pair involved.
Why would would hyperventilation cause blood pH to change? Would it increase or decrease?
This causes a decrease in the lungs, resulting in an decrease of
in the blood and an increase blood pH.
This causes a increase in the lungs, resulting in an increase of
in the blood and an decrease blood pH.
This causes a increase in the lungs, resulting in an increase of
in the blood and an increase blood pH.
This causes a increase in the lungs, resulting in an decrease of
in the blood and an increase blood pH.
This causes a decrease in the lungs, resulting in an increase of
in the blood and an increase blood pH.
This causes a decrease in the lungs, resulting in an decrease of
in the blood and an increase blood pH.
Less carbon dioxide in the lungs from the constant exhalation will cause the decrease in the hydrogen ion concentration in the blood, resulting in a rise in pH.
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