In addition to buffers present in the blood (most important is bicarbonate, but there are others as well) the body will help control blood pH by altering the ventilation rate. In response to acidosis, ventilation rate will ____ to help make corrections. increase decrease
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Step 1: Acidosis is a condition where the blood becomes too acidic. Show more…
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The human body's arterial blood pH is tightly maintained around 7.4 by buffering agents that bind hydrogen ions to prevent any change in pH. If an acid-base imbalance overcomes the buffer system, the body changes the ventilation rate, which is the rate at which gas enters and leaves the lungs. Changing the ventilation rate alters the concentration of CO2 in the blood, which in turn alters the pH of the blood. In this case, pH 7.4 is the homeostatic challenge.
Sukhada S.
INCREASE OR DECREASE 7. If the body is acidic, the kidney will increase secretion of hydrogen ions [H+]. 8. If the body is basic, the lungs will increase ventilation rate. 9. If there is a heart attack and a person stops breathing for a short period of time, the result will be a decrease in pH. 10. If a person freaks out on a plane, breathing in a paper bag will decrease the amount of carbon dioxide in the bloodstream. 11. Metabolic acidosis means there is an increase in the body's acid production by tissues. 12. Respiratory alkalosis is a condition where ventilation rate increases, creating basic conditions in the body. 13. TRUE or FALSE (write out the word): Slight deviation from the normal pH can shut down entire metabolic pathways and result in coma followed by death. 14. Common buffer systems in the body include the following: choose all that apply A. carbonic acid B. proteins C. lipids D. phosphates
Adi S.
The human body utilises a carbonate/hydrogen carbonate buffer system to help regulate the pH of blood and transport dissolved carbon dioxide, as shown by the following equation: H2O(l) + CO2(aq) ⇌ H2CO3(aq) ⇌ H+(aq) + HCO3-(aq) ⇌ H+(aq) + CO32-(aq) A healthy blood pH is between 7.35 and 7.45. Outside of these pH ranges proteins and enzymes begin to lose their function. When blood pH falls below 7.35, a person is said to be experiencing acidosis. One of the body’s reflexes to acidosis is to stimulate faster and deeper breathing. Using your understanding of buffers: a) Explain why the body stimulates faster and deeper breathing? b) What needs to happen to the body’s buffer system to return to a pH between 7.35 and 7.45? c) What would happen to blood pH if the body stimulated hypoventilation (slower and shallow breathing)? (There is no need to include quantitative values in your discussion, simplified qualitative terms such as ‘increase’ and/or ‘decrease’ will be sufficient).
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