Unit 9 · Transport in Animals
Question Bank
Cambridge IGCSE Biology 0610 · 80 questions
Q66Transport in Animals
Why does heart rate increase during exercise?
(a)To cool the blood
(b)To reduce blood pressure
(c)To lower the rate of respiration
(d)To supply more oxygen and glucose to muscles
Correct answer: (d) To supply more oxygen and glucose to muscles
Explanation: Faster aerobic respiration in muscles needs more oxygen and glucose and produces more CO2 to remove.
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