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BIO101: CH 6 Obj. 4
| Question | Answer |
|---|---|
| Nail matrix | Active growth region, not visible, at proximal end of nail bed |
| Arrector pili muscle | Attached to hair follicle; contracts in response to cold or fear, and causes goosebumps |
| Sebaceous glands | Groups of specialized epithelial cells; keep hair soft, pliable, waterproof; near or connected to hair follicles, everywhere but on palms and soles |
| Merocrine sweat glands | Abundant sweat glands with odorless secretion; lower body temperature; originate in deep dermis or subcutaneous layer and open to surface on forehead, neck, and back |
| Apocrine sweat glands | Less numerous sweat glands with secretions that develop odors; wet skin during pain, fear, emotional upset, and sexual arousal; near hair follicles in armpit and groin |
| Ceruminous glands | Modified sweat glands; secrete ear wax; external acoustic meatus |
| Mammary glands | Modified sweat glands; secrete milk; breasts |