| As sugar is constantly being removed from the blood by body cells to replace what is used up in respiration, more sugar is supplied by the |
| (a)Ingestion of carbohydrates |
| (b)Quick enzymatic hydrolysis of carbohydrates |
| (c)Direct active transport of sugar by intestinal epithelium into blood |
(d)Liver while converting its stored glycogen into sugar and releasing it into blood  |
