primary source of energy for the brain and nervous system under normal conditions is:
A)sucrose.
B)amino acids.
C)fructose.
D)glucose.
E)fatty acids.

Question

Quizplus · Accepted Answer

Glucose is the primary source of energy for the brain and nervous system under normal conditions. Glucose is a simple sugar that is easily transported through the blood-brain barrier and can be used by neurons for energy production. Other sources of energy, such as fatty acids and amino acids, can be used by the brain if glucose is not available, but glucose is the preferred source of energy. Sucrose and fructose must first be broken down into glucose and other simple sugars before they can be used by the brain for energy. Glucose is the primary source of energy for the brain and nervous system under normal conditions. It is a carbohydrate that is readily available from the breakdown of carbohydrates in the diet or from the storage form of glucose known as glycogen in the liver and muscles. While other sources of energy, such as fatty acids and amino acids, can be used by the brain and nervous system under certain circumstances, glucose is the preferred and most efficient fuel source.

Primary Source of Energy for the Brain and Nervous System