What happens when the CO2 level from cellular respiration increases in the blood?

• A. The blood pH decreases, leading to acidosis.
• B. The body temperature decreases.
• C. Oxygen levels in the blood increase significantly.
• D. The blood pH increases, leading to alkalosis.

Answer: (A)

Verified step by step guidance

1. Understand that CO2 is a byproduct of cellular respiration and is transported in the blood primarily as bicarbonate ions (HCO3-).
2. Recognize that an increase in CO2 levels in the blood leads to the formation of carbonic acid (H2CO3) through the reaction: CO2 + H2O ⇌ H2CO3.
3. Realize that carbonic acid dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3-), increasing the concentration of hydrogen ions in the blood.
4. Know that an increase in hydrogen ion concentration results in a decrease in blood pH, a condition known as acidosis.
5. Conclude that the increase in CO2 levels from cellular respiration leads to a decrease in blood pH, causing acidosis, rather than affecting body temperature or significantly increasing oxygen levels.