Respiratory System and cell respiration

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• What are the main respiratory surface on animals?

  alveoli
• How are the alveoli adapted for gas exchange?

  Large surface area. Thin walls. Moist walls. Permeable. Good blood supply, maintaining steep diffusion gradient.
• Describe how you breathe in

  The diaphragm contracts and flattens. Intercostal muscle contract. lifts ribcage up and out. volume of thorax increase. pressure of thorax decrease. air moves into lungs.
• Describe how model lungs is used to demonstrate breathing out

  Pushes the rubber diaphragm up. Volume of the jar will decrease. Pressure inside jar will increase. Air goes out of balloons. Balloon will deflate
• Why is respiration an exothermic reaction?

  Gives out energy
• What can energy from respiration be used for?

  Movement. Body heat. Growth. Reproduction. Active transport.
• In which part of a cell does aerobic respiration take place?
• Word equation for aerobic respiration

  Glucose+oxygen= carbon dioxide+water+energy
• Balance chemical equation for aerobic respiration

  C6H12O2+6O2=6CO2+6H2O+ energy
• Equation for anaerobic respiration in muscles

  Glucose= lactic acid+ energy
• equation for anaerobic respiration in yeast

  Glucose= ethanol+ carbon dioxide+ energy
• Similarities between aerobic respiration and anaerobic respiration in yeast?

  both use glucose. Both release energy. Both produce carbon dioxide.
• Differences between aerobic respiration and anaerobic respiration in yeast?

  Only aerobic uses oxygen. aerobic releases more energy. Only aerobic produces water. Anaerobic produces ethanol.