Why does shivering start only after exposure to cold air for some time, rather than instantly, despite peripheral thermoreceptors detecting the temperature drop?

💡 Explanation

Shivering doesn't start instantly because the hypothalamus, acting as the body's thermostat, has a set point. It must first integrate temperature signals and reach a threshold before activating shivering thermogenesis; therefore, a delay occurs, rather than an immediate response mediated solely by peripheral receptors.

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