Ultrasound heating affects tissue metabolism by increasing which parameter?

• A. Elasticity
• B. Metabolic rate
• C. Temperature
• D. Viscosity

Answer: (B)

Heating from ultrasound raises tissue temperature, and when temperature climbs, biochemical reactions in cells proceed more quickly. This speeds up metabolic processes, so the metabolic rate increases. Enzymes work faster and energy turnover rises, which supports healing activity. Elasticity and viscosity are physical tissue properties and don’t directly describe the change in metabolism here, and while temperature is the cause of the heating, the parameter that actually reflects the metabolic change is metabolic rate.