Shivering is a mechanism in which the body generates heat by:

Shivering is a mechanism in which the body generates heat by:

• A. Decreasing the metabolic rate
• B. Increasing the metabolic rate
• C. Dilating peripheral vessels
• D. Increasing heat loss

Answer: (B)

Shivering generates heat by increasing metabolic rate. When you’re cold, the body triggers involuntary, rapid skeletal-muscle contractions. Those muscle movements require energy, so your cells burn more fuel (ATP breakdown). The energy released as this process appears as heat, raising the body's core temperature to help defend against hypothermia. That’s the contrast with the other ideas: slowing metabolism would reduce heat production, widening peripheral vessels moves more warm blood to the skin and increases heat loss, and actively increasing heat loss would make you lose heat rather than generate it. Shivering is the body's automatic way to generate more heat through muscle activity.

Shivering generates heat by increasing metabolic rate. When you’re cold, the body triggers involuntary, rapid skeletal-muscle contractions. Those muscle movements require energy, so your cells burn more fuel (ATP breakdown). The energy released as this process appears as heat, raising the body's core temperature to help defend against hypothermia.

That’s the contrast with the other ideas: slowing metabolism would reduce heat production, widening peripheral vessels moves more warm blood to the skin and increases heat loss, and actively increasing heat loss would make you lose heat rather than generate it. Shivering is the body's automatic way to generate more heat through muscle activity.