(2)+Cellular+respiration+-+an+overview

An Overview of the Respiratory System
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**What is used up and what is produced?** Oxygen and glucose is being used up and energy, carbon dioxide and water vapor are produced as waste. **The chemical equation of respiration is:** Glucose + oxygen --> energy + carbon dioxide + water

**A diagram to help explain this can be found below:** [[image:Untitled_picture1.png]]
**Measuring respiration** A spirometer is used when measuring respiration. You have to breathe in and out of a mouthpiece connected to a chamber in the spirometer. A piston moves up and down inside the chamber and this movement is measured electronically. A spirogram is a graph which shows the changes in volume during breathing. media type="youtube" key="lWHx31BquBA?version=3" height="360" width="640"

**Aerobic and Anaerobic Respiration** Aerobic respiration uses oxygen to create energy and anaerobic respiration does not use oxygen to create energy. The good things about aerobic respiration are that the food molecules are broken down and a lot of energy is available to the cell from each food molecule. Something bad about it is that when there is no oxygen, it does not work. The good things about Anaerobic respiration is that you do not need oxygen to make energy, this means that you can make energy when there isn't any oxygen around you. Something bad about it is that the food molecule is only partly broken down and that only one-twentieth, of the amount of energy released using aerobic respiration, is released in anaerobic respiration.

(1) Cellular respiration – an overview
 * What is used up?
 * What is produced?
 * Word and chemical equations
 * How can we measure respiration?
 * What are aerobic & anaerobic respiration?
 * What is an advantage and disadvantage of each?