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Medicine LibreTexts

1.10: Summary

  • Page ID
    • Ions are charged particles, and electrolytes are solutions of ions in water.
    • Carbohydrates are made of carbon with hydrogen and oxygen (in the same ratio as water) linked together. The cell mainly uses carbohydrates for energy.
    • Fats are also made of carbon, hydrogen and oxygen. They are a powerful energy source, and are also used for insulation.
    • Proteins are the building materials of the body, and as enzymes make cell reactions happen. They contain nitrogen as well as carbon, hydrogen and oxygen.
    • Many also contain sulphur and phosphorous.


    • Ruth Lawson (Otago Polytechnic; Dunedin, New Zealand)