You Get Goose Bumps When You're Cold

question 70

Multiple Choice

You get goose bumps when you're cold. What purpose does that serve?

• A) They thicken the skin, improving insulation.
• B) Nothing really. It's just a reflex.
• C) They puff up fur to trap air that helps retain body heat for mammals that have fur or hair on their skin.
• D) They are a shivering mechanism that helps increase metabolic rate to increase heat production.
• E) Because blood circulation is directed away from the skin when a body is cold, the skin shrinks a little bit and this shows up as goose bumps.

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