Fig. 7.1 shows the human digestive system. State the letter in Fig. 7.1 that identifies: the gall bladder the organ that secretes salivary amylase where egestion happens where most absorption takes place where physical digestion happens where the pH is acidic.
The boxes on the left contain examples of nutrients, while the boxes on the right contain examples of molecules. Draw lines to connect each nutrient with a molecule found within it. Draw two lines.
State which vitamin deficiency leads to rickets.
Describe the dietary importance of the mineral ions calcium and iron. calcium ................................................................. iron .................................................................
Fat, protein, vitamins and mineral ions are all needed in a balanced diet. State the names of two further components of a balanced diet.