1) The skin regulates heat through  a) Arrector pili muscle contraction and sweating b) Vasodilation and sebum production c) sweating and sebum production d) sebum and arrector pili muscle relaxation 2) Sensory messages from the skin are interpreted through which system a) Nervous b) Integumentary c) Limbic  d) Endocrine 3) Sebum production on to the skins surface is known as a) Excretion b) toning c) Cleansing d) Secretion

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