For a Cell to Take Up Sugar from the Bloodstream

For a cell to take up sugar from the bloodstream,

A) sugars must bind to receptors on cells of the pancreas.
B) a person must have had a meal with sugar within the last twenty-four hours.
C) homeostatic mechanisms must activate the blood-brain barrier.
D) glycogen must be broken down to provide a supply of glucose.
E) the pancreas must supply the appropriate enzymes to make sugar available.