Question

amy is studying quietly. under these conditions, her muscles are using primarily______ for energy. fat glucose amino acids ketone bodies

Explanation:

When the body is at rest or engaged in low - intensity activities like studying quietly, the primary source of energy for muscles is fat. Glucose is more readily used during high - intensity or short - burst activities. Amino acids are mainly used for protein synthesis and repair rather than as a primary energy source under normal resting conditions. Ketone bodies are typically used as an energy source during prolonged fasting or in certain metabolic disorders.

Answer:

fat