Final answer:
The primary fuel source for nervous system cells and a key energy source for all body tissues is carbohydrates. They are broken down into glucose, the main fuel for the brain, and converted into ATP for cellular energy. Excess glucose is stored as glycogen in the liver and muscles, or as fat in adipose tissue. The correct answer is opton c.
Step-by-step explanation:
The primary fuel source for the cells of the nervous system, which is an important energy source for all body tissues, is carbohydrates. Carbohydrates, such as glucose, are broken down through catabolic chemical reactions into smaller molecules that can be used to produce ATP, the energy currency of the cell. Glucose is particularly important as it is the main source of fuel for the brain and nervous system, and the body has a number of mechanisms in place to ensure there is a steady supply of glucose in the bloodstream.
In comparison, proteins and fats are also essential components of our diet. Proteins provide the amino acids necessary for building body tissues, and while they can serve as an energy source, their primary role is not energy production. Fats, or lipids, are another source of energy, offering more energy density than carbohydrates or proteins; however, their main function is energy storage and providing insulation and protection to the body. Vitamins are essential nutrients required for various cellular functions, but they are not used as a primary energy source.
When food intake exceeds immediate energy needs, excess carbohydrates are stored as glycogen in the liver and muscle cells, or as fat in adipose tissue. This glycogen storage allows the body to have a readily available energy supply for times when glucose levels are low.