Aperson who continues moderate-intensity activities for more than minutes begins to use less glucose and more fat for fuel.
a. 2
b. 20
c. 15
d. 10
e. 5

A person who continues to exercise moderately for more than 20 minutes begins to use less glucose and more fat for fuel.

Explanation:

When a person engages in moderate intensity exercise, the blood glucose levels are balanced   due to the rise in hepatic glucose production and this stabilizes the blood glucose level. There is also a decrease in insulin level which activates the liver to glucagon and thereby increasing the production of glucose.  

Catecholamine increase glucose production and store it as a source of energy for athletes who runs a marathon.  It is also associated with lower risks of diabetes and increase hormonal balance in the body.

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