Question

During exercise, the cardiopulmonary system plays a role in acid-base balance by _.

A increasing the ph of blood by hypoventilation

B lowrering ph of blood by hypervetialting

C removing H+ from blood by using bicarbonate system

D aisinf kidney in removal of lactic acid

D

Answer 1

Removing H+ from blood using bicarbonate system

During exercise, there is increase in the requirement of the oxygen and hence there must be proper regulation of the H+ ion to prevent excessive buildup of lactic acid. During the exercise, there is increase in the lactic acid production and this tends to reduce the pH of the body. In order to maintain the acid base balance, the bicarbonate system tends to remove the H+ ions from blood. This bicarbonate system helps in maintaining the normal pH by removing the H+ ions from blood. The bicarbonate ion attaches to the H+ and removes it from the system which prevents acidosis after exercise.

The first option is not correct because during the workout and exercise, there is decrease in the pH of the body. This change in pH is caused due to increase requirement of energy in the body. Hypoventilation tends to increase the amount of CO2 in blood and decrease the pH.

The second option is not correct because acid base balance is maintained by maintaining a normal pH and not by lowering the pH. Hyperventilation tends to increase the pH content of the blood and hence makes it acidic.

The last option is not correct because the acid base balance is maintained by removal of the H+ with help of the bicarbonate system and this takes place in the lungs.