Question

What do you think is meant by the statement “the human digestive system is very efficient at squeezing everything it can out of any food?" How do you think this relates to the way biomolecules are broken down and used by the body?

Answer 1

The statement means that the human digestive system can adapt to extreme diets in order to survive. For example, carbohydrates can be broken down into sugars and used for energy. But when carbohydrates are not available in the required amount, it can also break down fats to provide the body with the required amount of energy. This explains why Deb has enough energy to keep going, even on her extremely limited diet.

Answer 2

The human digestive system is very efficient at squeezing everything it can out of any food because the enzyme and acid act to break down the food and give rise to the nutrients. if the proteins, carbohydrates, fats are present in sufficient amount firstly  the carbohydrates will be consumed then proteins in last the fats.

How the biomolecules are broken down into small molecules?

Digested food from the stomach is pushed into the small intestine, where it gets flooded with enzymes and fluid from the liver (bile) and the pancreas (pancreatic amylase,  lipase and trypsin,).

Those chemicals help to break down the molecules from the digesting food into its smallest components. The carbohydrate smallest form is glucose,  is a sugar molecule. Proteins can be broke to amino acids whereas fats can be broken to fatty acids and glycerol. The smallest forms of the nutrients pass through the small intestine walls and are absorbed into the bloodstream.

The protein, carbohydrates, and fat in foods we consume all are important for proper nutrition, but they must be in their smallest forms to be used by each cell in the body. This final stage in digestion occurs in the small intestine.

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