NURSING EXAM QUESTIONS
NUTRITION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is because food particles are too large to be absorbed.
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It is because food particles release energy during respiration.
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It is because food particles are too small to be stored in the body.
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It is because food particles may contain bacteria which will be killed by hydrochloric acid.
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Detailed explanation-1: -Nutrients need to be separated from food to be passed through the digestive epithelium to be utilised. If not broken down, large molecules produce toxic substances that pass through the epithelium of the digestive tract and are utilised by the cells. This can be lethal to the cells.
Detailed explanation-2: -Along the way, food is broken down into tiny molecules so that the body can absorb nutrients it needs: Protein must be broken down into amino acids. Starches break down into simple sugars. Fats break down into into fatty acids and glycerol.
Detailed explanation-3: -The food needs to be digested so that it can be converted into simple soluble forms. These simple soluble forms can provide energy to the body.
Detailed explanation-4: -Large food molecules (for example, proteins, lipids, nucleic acids, and starches) must be broken down into subunits that are small enough to be absorbed by the lining of the alimentary canal. This is accomplished by enzymes through hydrolysis.