Why is starch unable to pass through the gut wall
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Ответ:
Explanation:
Starch is a large molecule, so it cannot pass through certain structures, like selectively permeable cell membranes or parts of the digestive system.
This is why starch has to be digested multiple times. Digestion breaks down the starch into smaller molecules that can pass through structures. In the mouth, saliva contains an enzyme known as amylase that breaks down starch. Once the food passed to the small intestine, juice from the pancreas continues to break down the carbohydrates with the same enzyme.
Ответ:
The correct answer is option B.
Explanation:
Buoyant forces : It is an upthrust or an upward force exerted by the fluids on the weight of an object immersed in it.It always act opposite and perpendicular to the weight of the object.
This force is always larger on the bottom of an object than the force on top of an object.
In the given diagram. force A is pushing object downwards and force D is pushing the object upwards.
D > A (force at bottom> force at top)
So, the buoyant force of the cylinder is given by:
= Force D - Force A.