Nutrition and energy：练习题

A student is testing a food sample. They add Benedict's solution and heat the mixture in a water bath. The solution changes from blue to brick-red. Which nutrient is present?

Calculate the Body Mass Index (BMI) of an individual who weighs \(80\text{ kg}\) and has a height of \(2.0\text{ m}\). Is this individual classified as obese?

The structure of a villus is highly adapted for absorption. Which feature specifically reduces the distance over which nutrients must diffuse into the blood?

Which of these minerals is specifically required for the formation of haemoglobin in red blood cells to prevent anaemia?

In which part of the alimentary canal is trypsin produced, and where does it carry out its primary action?

State the mineral ion that is required as a structural component of haemoglobin and identify the deficiency disease that results if this ion is lacking in the diet.