Formative Practice 9.3 (Form 4 Biology Textbook Exercise and Answer)

Question 1:
State the meaning of assimilation.

Assimilation refers to the use of absorbed nutrients to synthesise complex compounds.

Question 2:
Explain the functions of the liver in the assimilation of digested food.

The functions of liver in assimilation:
• Carbohydrate metabolism Glucose is oxidised to yield energy. Most of the excess glucose are converted to glycogen and stored in the liver.

• Protein metabolism Liver cells use amino acids to synthesise plasma proteins and enzymes.

• Storage of nutrients Besides storing glycogen, the liver provides a place to store vitamins and mineral salts.

• Detoxification The liver serves as a filter and detoxifies dangerous particles such as drugs, alcohol and other foreign substances.

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