Human nutrition

Question 1

Functions of carbohydrates

Answer 1

• main source of energy ( glucose )
• cellulose to make cell wall
• storage substance in plants ( starch ) & in man
  ( glycogen )
• produce nectar in some flowers

Question 2

Functions of proteins

Answer 2

• growth & repair of damaged tissues
• make chemicals like enzymes & hormones
• make antibodies
• make muscles, tendons & ligaments
• source of energy during starvation

Question 3

Functions of lipids

Answer 3

• storage of energy
• source of energy
• insulating layer below the skin
• component of cell membrane
• solvent for fat-soluble hormones & vitamins
• cushion to protect delicate organs

Question 4

Salivary amylase pH

Answer 4

7

Question 5

Role of liver

Answer 5

• regulate blood sugar level
• deamination of excess amino acids
• detoxification
• storage
• heat production