Respiration. WHAT IS RESPIRATION? Breath is oxygen, breath out CO 2.

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Presentation transcript:

Respiration

WHAT IS RESPIRATION? Breath is oxygen, breath out CO 2

Which of these factors can we easily test in the classroom? WHAT MIGHT AFFECT HOW MUCH WE BREATH?

BROMOMETHYL BLUE PH TEST CO 2 = acidic Oxygen = basic

HOW CAN WE TEST HOW EXERCISE AFFECTS RESPIRATION? Time how quickly color changes to measure change in respiration

WHAT IS YOUR HYPOTHESIS? If a person exercises and blows into a bromomethyl blue solution, then the bromomethyl blue will ___________________ color ____________________, because respiration is occurring at a ____________________ rate.

WHAT HAPPENED? Bromomethyl blue solution changed color faster after exercise Respiration rate increased due to physical activity More activity, more oxygen needed Cause- physical activity Effect- increase breathing (oxygen intake)

WHY DO YOU NEED MORE OXYGEN WHEN EXERCISING? Physical activity requires ENERGY Oxygen is needed to produce ATP (energy for the cells)