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    Types of Respiration: Aerobic Respiration .Anaerobic Respiration

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    Hahsam
    There are two types of respiration: aerobic respiration and anaerobic respiration. Aerobic respiration requires oxygen and fully breaks down glucose to produce carbon dioxide, water, and a large amount of energy. Anaerobic respiration does not require oxygen and only partially breaks down glucose, producing less energy along with lactic acid in animals or ethanol in plants. Both plants and animals can undergo either aerobic or anaerobic respiration depending on the availability of oxygen.

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    Types of Respiration: Aerobic Respiration .Anaerobic Respiration

    Uploaded by

    Hahsam
    211 views3 pages
    There are two types of respiration: aerobic respiration and anaerobic respiration. Aerobic respiration requires oxygen and fully breaks down glucose to produce carbon dioxide, water, and a large amount of energy. Anaerobic respiration does not require oxygen and only partially breaks down glucose, producing less energy along with lactic acid in animals or ethanol in plants. Both plants and animals can undergo either aerobic or anaerobic respiration depending on the availability of oxygen.

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    Types of Respiration

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    There are two types of respiration: aerobic respiration and anaerobic respiration. Aerobic respiration requires oxygen and fully breaks down glucose to produce carbon dioxide, water, and a large amount of energy. Anaerobic respiration does not require oxygen and only partially breaks down glucose, producing less energy along with lactic acid in animals or ethanol in plants. Both plants and animals can undergo either aerobic or anaerobic respiration depending on the availability of oxygen.

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    © All Rights Reserved
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    211 views3 pages

    Types of Respiration: Aerobic Respiration .Anaerobic Respiration

    Uploaded by

    Hahsam
    There are two types of respiration: aerobic respiration and anaerobic respiration. Aerobic respiration requires oxygen and fully breaks down glucose to produce carbon dioxide, water, and a large amount of energy. Anaerobic respiration does not require oxygen and only partially breaks down glucose, producing less energy along with lactic acid in animals or ethanol in plants. Both plants and animals can undergo either aerobic or anaerobic respiration depending on the availability of oxygen.

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    TYPES OF

    RESPIRATION
    Respiration is classified into two major
    types,depending on the availability of
    oxygen:

    . Aerobic respiration
    .Anaerobic respiration

    1.Aerobic Respiration:
    Aerobic means with air. This type of respiration needs oxygen for it to
    occur so it is called aerobic respiration. The word equation for aerobic
    respiration is:
    Glucose + Oxygen

    Carbon dioxide + Water + Energy

    The chemical equation is:


    C6H12O6 + 6O2

    6CO2 + 6H2O + 2900 kJ/mol

    It is important that you learn both the word and chemical equation.
    In the above equations we see that glucose is broken down by oxygen to
    release energy with carbon dioxide and water being produced as byproducts of the reaction. Approximately 2900 kJ of energy is released when
    one mole of glucose is broken down. The released energy is used to make
    a special energy molecule called Adenosine triphosphate (ATP). ATP is
    where the energy is stored for use later on by the body.
    Aerobic respiration occurs in plants as well as animals. Oxygen enters
    plant cells through the stomata. Plants produce their food via
    photosynthesis and release energy from it through the process of
    respiration. Below is a reminder of what the equation for photosynthesis is:

    (Energy via sunlight)

    Carbon dioxide + Water

    Glucose + Oxygen

    Comparing the two equations we can see that aerobic respiration works in
    the opposite way to photosynthesis. During the day both photosynthesis
    and respiration are taking place at the same time, though photosynthesis is
    occurring at a faster rate. At night when there is no light only respiration
    takes place

    2.Anaerobic respiration:
    Anaerobic means without air (an means without). Sometimes there is not
    enough oxygen around for animals and plants to respire, but they still need
    energy to survive. Instead they carry out respiration in the absence of
    oxygen to produce the energy they require this is called anaerobic
    respiration.

    a) In animals
    Our muscles need oxygen and glucose to respire aerobically and produce
    the energy they require, these are carried to the muscle via the blood.
    However if we were to carry out vigorous exercise our heart and lungs
    would not be able to get sufficient oxygen to our muscles in order for them
    to respire. In this case muscles carry out anaerobic respiration. The word
    and chemical equation for anaerobic respiration in is:

    Glucose
    C6H12O6

    Lactic acid + Energy


    2C3H6O3 + 120 kJ/mol

    As you can see anaerobic respiration is not as efficient as aerobic and only
    a small amount of energy is released. This is because glucose can only be
    partially broken down. As well as this inefficiency a poisonous chemical,
    lactic acid is also produced, if this builds up in the body it stops the muscles
    from working and causes a cramp. To rid the body of lactic acid oxygen is

    needed, the amount of oxygen required to break down the lactic acid is
    referred to as the oxygen debt.

    b) In Plants
    The oxygen supply to plants can also run out, this happens for example if
    the soil gets waterlogged. In this case they have to obtain their energy via
    anaerobic respiration. Below is the word and chemical equation for
    anaerobic respiration in plants:

    Glucose
    C6H12O6

    Ethanol + Carbon dioxide + Energy


    2C2H5OH + 2CO2 + Energy

    When the above reaction occurs in yeast cells it is referred to


    as fermentation. Fermentation is the process used for baking bread and
    brewing alcohol.

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