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    Digestion and Absorption

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    Digestion and Absorption
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    (b) How does pepsinogen change into its active form ?

    Pepsinogen is a proenzyme secreted by chief cells. It is converted into active form i.e pepsin by HCl. HCl provides the optimum pH for the enzyme pepsin. Once pepsin is formed it itself converts pepsinogen into pepsin. This proces is called autocatalysis. How does pepsinogen change into its active form ?

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    • What is the function of enamel in digestion?
    The enamel helps in the mastication of food.
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    What is the order of arrangement of teeth in each half of the upper and lower jaw ?
    The order of arrangement of teeth in each half of the upper and lower jaw is I,C,PM,M.  I (incisors), C (cannine), PM (premolars), M (molars).
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    Name the fat soluble vitamins.
    Vit A, D, E and  are fat soluble vitamins.
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    What are Sanguivorous animals ?
    The animals which suck blood e.g. leech, vampire bat, female mosquito etc.
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    What is Diphyodont ?

    Diphyodont is the condition of having two set of teeth during the life of an organism. For example : humans are diphyodont as they have two set of teeth namely temporary milk or deciduous teeth which are replaced by permanent or adult teeth. 

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