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    Respiration BIOLOGY Year 9 Poster

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    erina
    Aerobic respiration takes place in mitochondria to produce energy through the reaction of glucose and oxygen producing carbon dioxide and water. It provides energy for cellular processes like growth, movement and homeostasis. The reactants come from food and air inhaled, and the products are exhaled or contained in fluids. Anaerobic respiration occurs without oxygen, like during vigorous exercise, producing lactic acid in animals and ethanol in yeast. It is also used by germinating seeds and provides energy through different equations. EPOC occurs after exercise as oxygen is used to break down lactic acid and return the body to its pre-exercise state.

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    Respiration BIOLOGY Year 9 Poster

    Uploaded by

    erina
    27 views7 pages
    Aerobic respiration takes place in mitochondria to produce energy through the reaction of glucose and oxygen producing carbon dioxide and water. It provides energy for cellular processes like growth, movement and homeostasis. The reactants come from food and air inhaled, and the products are exhaled or contained in fluids. Anaerobic respiration occurs without oxygen, like during vigorous exercise, producing lactic acid in animals and ethanol in yeast. It is also used by germinating seeds and provides energy through different equations. EPOC occurs after exercise as oxygen is used to break down lactic acid and return the body to its pre-exercise state.

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    Aerobic respiration takes place in mitochondria to produce energy through the reaction of glucose and oxygen producing carbon dioxide and water. It provides energy for cellular processes like growth, movement and homeostasis. The reactants come from food and air inhaled, and the products are exhaled or contained in fluids. Anaerobic respiration occurs without oxygen, like during vigorous exercise, producing lactic acid in animals and ethanol in yeast. It is also used by germinating seeds and provides energy through different equations. EPOC occurs after exercise as oxygen is used to break down lactic acid and return the body to its pre-exercise state.

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    © All Rights Reserved
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    27 views7 pages

    Respiration BIOLOGY Year 9 Poster

    Uploaded by

    erina
    Aerobic respiration takes place in mitochondria to produce energy through the reaction of glucose and oxygen producing carbon dioxide and water. It provides energy for cellular processes like growth, movement and homeostasis. The reactants come from food and air inhaled, and the products are exhaled or contained in fluids. Anaerobic respiration occurs without oxygen, like during vigorous exercise, producing lactic acid in animals and ethanol in yeast. It is also used by germinating seeds and provides energy through different equations. EPOC occurs after exercise as oxygen is used to break down lactic acid and return the body to its pre-exercise state.

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    of 7

    What is the equation for aerobic respiration?

    Word and symbol


    Glucose + Oxygen  Water + Carbon Dioxide

    C6H12O6 + 6O2  6H2O + 6CO2


    What are the functions of aerobic cellular respiration?
    Aerobic respiration takes place in order to supply energy
    for cellular processes, for e.g. cell division during mitosis
    (which is for growth), digestion (during active transport),
    protein synthesis, homeostasis, repair and movement.
    Where are the reactants sourced and products destined?
    The reactants are glucose and oxygen. Glucose comes
    from the breakdown of food (that contains carbohydrate)
    whereas oxygen comes from the air we breathe in via
    inhalation. The process takes place in the mitochondria,
    where energy is released alongside the production of
    carbon dioxide and water. Carbon dioxide is exhaled since
    it is considered a waste product of metabolism whereas
    water is contained inside the plasma, gets rid of waste
    products through urine and helps the body to cool down.
    What is the function of anaerobic respiration in animals
    and plants? Give examples of when it is used.
    Anaerobic respiration in animals plants take place for a
    supply of energy when there is an oxygen debt. Similar to
    aerobic respiration, this energy can be used in cellular
    processes like movement, growth, digestion, protein
    synthesis, homeostasis and repair. For e.g. in plants, when
    they are just a germinating seed, they could have a lack of
    air exposure (lack of oxygen), so they respire
    anaerobically, whereas in animals, for e.g. in humans,
    anaerobic respiration occurs during vigorous exercise
    when not enough oxygen is present for aerobic respiration
    to take place.
    Give the equations for anaerobic respiration in animals
    and plants/fungi
    Animals: glucose  lactic acid

    (C6H12O6  2C3H6O3)

    Yeast: glucose  alcohol + carbon dioxide

    (C6H12O6  2CH5OH + 2CO2)


    What is EPOC? Describe how it is caused.
    EPOC is when there are increased levels of oxygen
    consumption that occur after vigorous exercise when the
    body recovers, repairs and returns to its pre-exercise
    state. During exercise, oxygen debt occurs where the
    respiratory and cardiovascular systems haven’t caught up
    yet with our moving body. Therefore, anaerobic
    respiration is used instead which produces lactic acid.
    Moreover after exercise is finished, there is a surplus of
    excess oxygen during this post-exercise period. Since
    lactic acid causes painful cramps in our muscles, it needs
    to be broken down in carbon dioxide and excreted
    immediately out of our bodies via exhalation. This excess
    oxygen will then be supplied to the liver, where the
    breakdown of lactic acid will occur.

    Plan an investigation to investigate the respiration of germinating seeds.


    Include the variables and equipment list as well as a method.
    Equipment list:
    Respirometer, Gauze, Filter Paper, Manometer (containing coloured liquid), Glass Beads.

    Independent variable: Different temperatures

    Dependent variable: Rate of respiration (The movement/distance moved by the coloured liquid will
    give a measure of volume of oxygen taken up by germinating seeds for respiration)

    Control variable: Sodium hydroxide concentration

    Control: Glass beads

    Method:
    The apparatus will contain two tubes, one which has germinating seeds while the other is filled with
    glass beads of the same mass. They contain a chemical, sodium hydroxide, in order to absorb any
    carbon dioxide from the tube when it is given off during respiration, so that volume changes are only
    based on the amount of oxygen absorbed by the germinating seeds. This can improve the accuracy
    of the experiment. In order to investigate temperature in this experiment, it must be repeated
    several times (around 2-4 times) at different temperatures (for e.g. 30 degrees Celsius, 40 degrees
    Celsius, 50 degrees Celsius and etc). When the coloured liquid moves towards the germinating
    seeds, it shows that the volume has reduced; thus, increasing the pressure that causes the liquid to
    move this way. This measured distance moved by the coloured liquid, within a specific time, will
    provide the volume of oxygen taken up by the germinating seeds per minute.

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