Respiration

Question 1

Compare the oxygen uptake when the athlete is walking and running at speeds from 6 to 10km per hour

Answer 1

• both increase
• oxygen uptake increases more when running and less when walking
• from 6-8km per hour running has a higher oxygen uptake

Question 2

Complete the word equation for aerobic respiration.

Answer 2

Oxygen + Glucose —> water + carbon dioxide

Question 3

Explain why oxygen uptake increases as an athlete runs at faster speed

Answer 3

• muscles contract more

- more aerobic respiration so more energy needed from aerobic respiration

Question 4

Which statement numbers are true?

Answer 4

B - Statement 2 only

Question 5

Explain how the higher cardiac output after 4 weeks of training increased the rate of aerobic respiration.

Answer 5

• more blood per minute

- more oxygen to muscles

Question 6

State a chemical that could be placed in the respirometer that would stop carbon dioxide affecting the experiment

Answer 6

• cotton wool soaked with potassium hydroxide