Exercise

• What is the main focus of the video on exercise and the human body?

  How exercise affects cellular respiration
• Why does exercise require more cellular respiration?

  Muscles need more energy for movement
• What do muscular contractions require for energy?

  Energy from respiration
• What must increase to supply more oxygen to muscles during exercise?

  The rate and volume of breathing
• What is a downside of increased breathing during exercise?

  It requires more energy to move lung muscles
• What happens to heart rate during exercise?

  Heart rate increases to pump oxygen faster
• What is the purpose of increased effort during exercise?

  To supply enough oxygen for aerobic respiration
• When does the body switch to anaerobic respiration?

  When there is insufficient oxygen during intense exercise
• What is a major drawback of anaerobic respiration?

  It produces lactic acid
• What sensation does lactic acid buildup cause?

  A burning sensation in muscles
• What must the body do after exercise regarding lactic acid?

  React lactic acid with oxygen to remove it
• What term describes the need for extra oxygen after exercise?

  Oxygen debt
• What happens to lactic acid in the liver?

  It reacts with oxygen to form glucose
• What are the two main measurements to investigate exercise effects on the body?

  • Breathing rate
  • Heart rate
• How do you measure breathing rate?

  Count chest rises and falls in one minute
• How can you measure heart rate?

  By measuring pulse on wrist or neck
• What type of questions might be asked about exercise effects?

  • Measuring changes before and after exercise
  • Describing or explaining those changes
• Where can you find more educational resources related to this topic?

  On the Cognito website
• What can you find on the Cognito website?

  Videos, questions, flashcards, and past papers
• What does signing up on Cognito provide?

  Tracking of study programs and resources