Question

during a marathon, runners will use up atp and glucose early in the race. which energy source is generally used next for producing more atp? phospholipids topic: sec. 6.2 skill: understanding glycogen steroids starch cellulose

Explanation:

When ATP and glucose are depleted during a marathon, the body turns to glycogen. Glycogen is a stored - form of glucose in animals. It can be broken down into glucose to produce ATP. Phospholipids are part of cell membranes, steroids have various regulatory functions, starch is a plant - storage molecule, and cellulose is a structural component in plants.

Answer:

B. glycogen