List as many words as you can that relate to respiration in a spider diagram. ◦ Recall that the process of respiration releases energy in living organisms ◦ Describe the differences between aerobic and anaerobic respiration ◦ Recall the word equation and the balanced chemical symbol equation for aerobic respiration in living organisms. ◦ Recall the word equation for anaerobic respiration in plants and in animals ◦ Describe simple controlled experiments to demonstrate the evolution of carbon dioxide and heat from respiring seeds or other suitable living organisms. Cells get their energy from food. The energy is released from the food by a process called respiration. In respiration glucose is combined with oxygen to release energy. Carbon dioxide and water are formed. This happens inside the mitochondria of the cell. Oxygen H2O Energy carbon dioxide glucose C6H12O6 CO2 water O2 Energy Word equation C6H12O6 + 6O2 Symbol equation 6CO2 + 6H2O + Energy Active transport Moving things around the cell Muscle contractions Transmitting nerve impulses (if in a nerve cell). Some released in the form of heat (keep body temperature constant). This is the type of respiration that releases energy by combining glucose with oxygen. Hence why its called aerobic respiration! Because it uses air which contains oxygen. However…..it is possible to release energy from sugar without using oxygen. What type of respiration is this? This type of respiration releases energy from glucose without oxygen. Anaerobic respiration (‘an’ means without). Disadvantages of it: Less efficient than aerobic respiration Doesn’t produce as much energy as aerobic respiration. Yeast is a single celled fungus. It respires anaerobically. It breaks down sugar to alcohol. Glucose alcohol + carbon dioxide + energy Some cells in our bodies respire anaerobically for a short while (especially in our muscle cells). They make lactic acid instead of alcohol. Glucose lactic acid + energy