Question

15 Review the mechanisms for body temperature regulation by classifying each mechanism listed on the left with its thermoregulatory effect on the right. Effect: Decrease Heat Loss Effect: Increase Heat Production Food intake Vasodilation of skin arterioles Decreased secretion of epinephrine Vasoconstriction of skin arterioles Curl up (reduce surface area) Secretion of epinephrine (nonshivering thermogenesis) Effect: Increase Heat Loss Effect: Decrease Heat Production Decrease voluntary muscle movement Put on warmer clothes Shivering thermogenesis Decrease food intake (fasting) Sweating Put on fewer clothes or remove clothing layers

Answer 1

The following mechanisms are responsible for thermoregulation in our body.

Temperature of our body can be increased by heat production or by preventing heat loss

Temperature of the body can be decreased by reducing heat production or by increasing heat loss

Decrease heat loss

• Put on warmer clothes
• Vasoconstriction of skin arterioles
• Curl up ( reduce surface area)

Increase heat loss by

• Sweating
• Put on fewer cloths or remove clothing layers
• Vasodilation of skin arterioles

Increase heat production

• Food intake
• Shivering thermogenesis (thermogenesis means heat production)
• Secretion of epinephrine (non shivering thermogenesis)

Decrease heat production

• Decreased secretion of epinephrine
• Decrease voluntary muscle movement
• Decrease food intake