Physiological Effects of Heat Therapy

Thermotherapy involves applying heat to tissues, causing physiological changes such as increased tissue temperature, vascular dilation, and enhanced cell metabolism. These changes improve oxygen and nutrient delivery, aid in healing, and reduce edema. Heat application also helps in pain control by decreasing congestion and blocking pain transmission through nerve stimulation.

What is the primary temperature range required for superficial heat applications to produce physiological effects?

• 120 to 130 degrees

• 104 to 113 degrees

• 90 to 100 degrees

• 80 to 90 degrees

How does heat transfer occur during thermotherapy?

• Through evaporation

• Through conduction

• Through convection

• Through radiation

What physiological change is caused by an increase in tissue temperature?

• Vascular constriction

• Reduced nutrient flow

• Decreased oxygen delivery

• Vascular dilation

What happens to the cell's metabolic rate for every 18° increase in skin temperature?

• It increases by a factor of 2 to 3 times

• It doubles

• It remains the same

• It decreases by half

What is the effect of increased cell metabolism on capillary flow?

• Capillary flow becomes stagnant

• Increased capillary flow

• No change in capillary flow

• Decreased capillary flow

How does increased venous return aid in recovery?

• By reducing harmful metabolites

• By increasing edema

• By causing tissue damage

• By decreasing lymphatic permeability

What is the effect of increased lymphatic permeability during thermotherapy?

• Has no effect on edema

• Decreases edema formation

• Increases edema formation

• Causes tissue dehydration

How does increased circulation help in pain control during thermotherapy?

• By causing more pain

• By increasing pain-producing chemicals

• By reducing congestion

• By increasing congestion

What is the role of heat in blocking pain transmission?

• It increases pain sensitivity

• It reduces nerve activity

• It stimulates nerve endings

• It has no effect on nerves