Question

uns w une sent, ultimately decreasing the H concentration and increasing the pH. As you might expect, blood cycles from a pH of about 7.20 in respiring tissues to about 7.60 in the lungs. Why rebreathing CO2 prevents fainting during a panic attack Let's return to Harold, the man who was hyperventilating in this case. Given your understanding of pH, acid-base equilibria, and a little about the structure and function of hemoglobin, hopefully it is now clearer why rebreathing his exhaled CO, may have prevented Harold from losing consciousness. Now, let's examine the relationship between breathing rate and the concentration of dissolved CO, in the blood. What is the immediate effect of hyperventilation (breathing too fast) on the CO, concentration in the blood? Hyperventilation decreases the Co, concentration in the blood. Hyperventilation does not affect the CO, concentration in the blood. Hyperventilation increases the CO, concentration in the blood.

Answer 1

Hyperventilation decreases CO₂ concentration in the blood.

Hyperventilation is the condition of excessive breathing. Rapid removal of CO₂ causes drop in concentration of CO₂ in blood. As the partial pressure of CO₂decreases blood vessel narrows down due to which blood supply to the brain is reduced.