Adelle often has goose bumps on her arms. Explain how the goose bumps are formed and why she will never have goose bumps on the palms of her hands or on the soles of her feet

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A smooth muscle, called the arrector pili muscle, is attached to the hair follicle. During the contraction of this muscle, the hair stands up. A goose bump is a tiny mound of flesh that forms at the base of this erect hair. Goose bumps cannot form at places where hair is not present, such as the palm of a hand and the sole of a foot.

Biology & Microbiology

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