What is the body's response to heat stress during exercise?

What is the body's response to heat stress during exercise?

• A. Decrease in heart rate and blood flow
• B. Increase in sweat production and vasodilation of blood vessels
• C. Restriction of blood flow to muscles
• D. Decreased respiratory rate

Answer: (B)

The body's response to heat stress during exercise includes an increase in sweat production and vasodilation of blood vessels. When the body temperature rises during physical activity, it needs to cool itself to maintain homeostasis. One primary mechanism for this is sweating, which helps to cool the body through the evaporation of sweat from the skin's surface. Additionally, vasodilation occurs, where blood vessels, particularly those close to the skin's surface, expand to increase blood flow. This enhanced blood flow helps to dissipate heat through the skin, allowing for more efficient cooling. The combination of these physiological responses helps the body manage heat stress effectively and prevent overheating during exercise.

The body's response to heat stress during exercise includes an increase in sweat production and vasodilation of blood vessels. When the body temperature rises during physical activity, it needs to cool itself to maintain homeostasis. One primary mechanism for this is sweating, which helps to cool the body through the evaporation of sweat from the skin's surface.

Additionally, vasodilation occurs, where blood vessels, particularly those close to the skin's surface, expand to increase blood flow. This enhanced blood flow helps to dissipate heat through the skin, allowing for more efficient cooling. The combination of these physiological responses helps the body manage heat stress effectively and prevent overheating during exercise.