Effects of Exercise on the Human Body

What happens to the breathing rate and heart rate during exercise?

• They both decrease to conserve energy.

• They both increase to supply more oxygen to muscles.

• Breathing rate increases, but heart rate decreases.

• Breathing rate decreases, but heart rate increases.

Why do muscles sometimes switch to anaerobic respiration during intense exercise?

• Because there is an excess of oxygen available.

• Because it is more efficient than aerobic respiration.

• Because the demand for oxygen exceeds the supply.

• Because it produces more energy than aerobic respiration.

What is the main byproduct of anaerobic respiration that causes muscle discomfort?

• Water

• Lactic acid

• Carbon dioxide

• Glucose

How can you measure someone's breathing rate after exercise?

• By counting the number of heartbeats per minute.

• By measuring the volume of air exhaled.

• By counting the number of chest rises and falls in a minute.

• By checking the color of their skin.

Where can you find additional resources and practice questions related to exercise effects on the body?

• In a local library.

• On the Cognito.org website.

• In a fitness magazine.

• On a social media platform.