1.6.12

Respiration During Exercise

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Respiration During Exercise

Exercise increases the body's energy demands. The rate of respiration must increase in order to meet these new demands. The main responses to increase the rate of respiration are:

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Increased heart rate

  • An increase in heart rate delivers more blood (containing glucose and oxygen) to the muscles.
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Increase in breathing rate

  • An increase in breathing rate increases gas exchange in the lungs, with more oxygen taken in and more carbon dioxide released.
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Increase in breath volume

  • An increase in breath volume also increases the rate of gas exchange.
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Blood vessels dilate

  • Blood vessels dilate (open wider) to ensure more blood reaches the muscles.

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1Biology

1.1Cells, Tissues & Organs

1.2Reproduction & Variation

1.3Ecological Relationships & Classification

1.4Digestion & Nutrition

1.5Plants & Photosynthesis

1.6Biological Systems & Processes

2Chemistry

2.1Particles

2.2Chemical Reactions

2.3Atoms, Elements, Compounds

2.4The Periodic Table

2.5Materials & the Earth

2.6Reactivity

2.7Energetics

2.8Properties of Materials

3Physics

3.1Energy

3.2Forces & Motion

3.3Waves

3.4Electricity & Magnetism

3.5Matter

3.6Space Physics

4Thinking Scientifically

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