Question

State two reasons why accumulation of lactic acid leads to increase in heartbeat

Answer 1

The buildup of lactic acid triggers chemoreceptors to signal an increase in heart rate for faster circulation and waste removal and to enhance oxygen supply to muscles.

Step-by-step explanation:

The accumulation of lactic acid in the bloodstream leads to an increase in heartbeat for a couple of reasons. First, chemoreceptors in the blood are sensitive to changes in pH, especially to increased levels of ions such as H*, CO₂, and lactic acid. When the levels of these substances rise, chemoreceptors signal the brain to accelerate the heartbeat to ensure quicker circulation and removal of metabolic waste.

Second, the presence of lactic acid signals that the muscles are engaged in anaerobic respiration due to a lack of oxygen, hence why the body responds by increasing the heart rate to facilitate oxygen delivery and the removal of lactic acid.

In summary, the body responds to the buildup of lactic acid by increasing the heart rate to maintain homeostasis and optimize the body's performance under stress.

Answer 2

Answer: The body has entered anaerobic state.

Explanation: In this case the body then increases heartrate to provide the muscle with more oxygen through the blood which also it allows for the body to remove toxins from the cells. This is what creates the burn as lactic Acid builds up as we exercise.