Response to excercise

• What does exercise invoke in the body?

  The contraction and relaxation of muscles
• How does exercise affect energy demand?

  It increases the demand for energy
• What process transfers energy during exercise?

  Respiration
• Which type of respiration transfers more energy?

  Aerobic respiration
• What happens to the muscles during aerobic respiration?

  They receive more oxygen
• What physiological change occurs to support increased oxygen delivery to muscles?

  More blood reaches the muscles
• What happens to the heart rate during exercise?

  It increases
• What is the effect of exercise on oxygen consumption in cells?

  More cells are consuming oxygen
• What happens to breathing volume during exercise?

  It increases
• What causes muscles to become fatigued during vigorous activity?

  Long periods of vigorous activity
• What is the result of incomplete oxidation of glucose in muscles?

  It causes a build-up of lactic acid
• What is oxygen debt?

  The amount of extra oxygen needed to convert lactic acid back into glucose
• Where is lactic acid transported in the body?

  To the liver
• What happens to lactic acid in the liver?

  It is converted back into glucose using oxygen
• What are the effects of exercise on the body regarding energy and oxygen?

  • Increases demand for energy
  • More energy is transferred during aerobic respiration
  • Muscles receive more oxygen
  • More blood reaches muscles
  • Increased heart rate
  • More cells consume oxygen
  • Increased breathing volume
• What are the consequences of long periods of vigorous activity on muscle function?

  • Muscles become fatigued
  • Stop contracting efficiently
  • Incomplete oxidation of glucose
  • Build-up of lactic acid
  • Oxygen debt occurs
• What is the process of lactic acid management in the body?

  • Lactic acid is transported to the liver
  • Converted back into glucose using oxygen
  • Extra oxygen needed is termed oxygen debt