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22 March, 19:06

What is the function of bile? causes fats to dissolve in water digests fats and some vitamins an enzyme which accelerates digestion all of the above?

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  1. 22 March, 19:18
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    Causes fats to dissolve in water

    Bile is a dark green to yellowish brown fluid produced by the liver that aids in the digestion of fats. It tends to act as a surfactant to allow for fats to be emulsified in the digestive tract. This emulsification increases the surface area of fats within the digestive system and gives greater access to those fats by the enzyme pancreatic lipase, which digests the fats. If these fats were not emulsified, and instead allowed to aggregate into larger groups, most of the fats would pass undigested through the digestive system and be excreted into the feces. With that in mind, let's look at the available options and see what is correct.

    causes fats to dissolve in water

    * This is one way of looking at it. Bile allows the fats to be emulsified because about 0.7% of the bile is bile salts, These salts are hydrophilic (water loving) on one side and hydrophobic (water hating) on the other side. Because of this, they aggregate around fat droplets and keep those fat droplets from aggregating into larger droplets. This process is similar to how oil is dispersed within mayonnaise. So this is the correct choice.

    digests fats and some vitamins

    * As mentioned above, bile doesn't actually digest the fats. What it does is make the fats more accessible to digestive enzymes which digest the fat. So this choice is wrong.

    an enzyme which accelerates digestion

    * As mentioned above, bile isn't an enzyme. So this choice is wrong. all of the above

    * Since some of the above choices are wrong, this too is wrong.
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