Which of the following BEST describes the recommended simple sugar intake for athletes? A. Most athletes should eliminate all sugar from the diet.
B. Most athletes should keep sugar intake to less than 5% of total daily energy intake.
C. Most athletes should keep sugar intake to less than 10% of total daily energy intake.
D. Sugar should not be restricted in the athlete's diet because it provides a good source of carbohydrate for the working muscle.
.

B

Explanation:

because sugar is common in food but he needs to limit it

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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"a.) well–developed vascular system."