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Biology

PRACTICAL: Investigating the effect of exercise on breathing

QuestionAnswer
What 2 pieces of apparatus are needed for this experiment? 1. Stopwatch 2. 2 Students
How do we calculate the student's breathing rate at rest? Count the number of breaths they take in one full minute
How long should the student exercise for before calculating their breathing rate again? At least 4 minutes
How do we calculate the student's breathing rate after exercise? Count the number of breaths they take in one full minute
Name 3 factors that must be kept the same in this experiment 1. Type of exercise done 2. Temperature of the environment 3. Food eaten by the students beforehand
What are we changing in the experiment? Whether the student has exercised or not
What 3 things about the organism must be kept the same? 1. Size 2. Gender 3. Relative fitness
What does the experiment show? Breathing rate increases with exercise
Why does breathing rate increase with exercise? Muscles respire more, meaning they need more oxygen supply and more carbon dioxide to be removed
Created by: JoeMather
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