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68C Ch.6 Ph.1 T.3

Hole's Essentials of A&P Chapter 6: Integumentary System

Functions of the skin Retarding water loss, body temperature regulation, sensory reception, excretion, protective covering
Describe how skin plays a role in vitamin D production Dehydrocholesterol synthesized by cells in the digestive system. Reaches skin by blood, exposed to UV rays, converted to vitamin D
Function of melanin Absorbs UV rays in sunlight, preventing it from causing mutations
Factors influencing skin color melanin, sunlight, blood, diet, biochemical imbalances
Eccrine gland most numerous glands, respond to body temperature by environmental heat. located on forehead, neck, back, release moisture
Apocrine gland sweat glands that begin at puberty, most numerous in axillary and groin regions
Explain how body heat is produced During physical exercise muscles release heat, blood carries heat away, reaches hypothalamus in brain(hypothalamus controls set point)
Eumelanin produce brownish-black
Phoemelanin produce reddish-yellow
Keratinization older cells harden, form a layer known as stratum corneum
Statum Lucidum thickened and hairless skin of the palms and soles
Stratum Corneum Outermost layer dead cells
Melanocytes Produces melanin in the deepest layer of the epidermis
The cells of the epidermis that reproduce are in the stratum basale
Which layer of epidermis can only be found in the thickened skin of the palms and soles? stratum lucidum
The sebaceous glands of the skin are holocrine glands
The nail plate is formed by specialized cells in the.. which layer? epidermis
Where are the sweat glands most numerous head and neck
A scar is formed by newly formed connective tissue
The function of sebum is to keep the skin and hair soft and waterproof, sebum is oily.
The layer of skin that has cells containing cytoplasm filled with keratin is the stratum corneum
Created by: ajwildasin30
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