Response to excercise

• When resting


  The body doesn't need a great deal of energy
• During exercise

  The body needs a great deal of energy for muscle contraction
• Body's reaction to more energy demand during exercise


  1. Aerobic respiration increases

  2. Breathing rate and volume increase

  3. Heart rate increases
• When oxygen supply is insufficient during exercise


  Anaerobic respiration takes place in the muscles
• Anaerobic respiration


  glucose->latic acid is incomplete formula , leading to a buildup of lactic acid
• During long periods of vigorous activity

  Lactic acid causes the muscles to become fatigued and stop contracting efficiently
• Oxygen debt


  The amount of extra oxygen the body needs after exercise to deal with the accumulated lactic acid
• Removing lactic acid from the body

  1. Lactic acid is transported to the liver by the blood

  2. Lactic acid can change back to glucose through a series of chemical reactions

  3. Reacting with and removing the accumulated lactic acid requires oxygen