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A&P Chapter 5

Part 1

QuestionAnswer
List the three major regions of the skin in order from most superficial to most deep. Epidermis – outermost superficial region · Dermis – middle region · Hypodermis - (superficial fascia) - deepest region
what is the function of the epidermis protection
how do cell of the epidermis get nutrition by diffusion from blood vessels in the dermis
what type of epithelium makes up the epidermis stratified squamous epithelium
what type of cell produces the fibrous protein keratin for protection keratinocytes
what type of cell produces a brownish pigment called melanin melanocytes
what is the function of melanin Protect their nuclei of keratinocytes from UV radiation from the sun.
What type of cells help activate the immune system and ingest foreign substances by phagocytosis? Langerhans's cell
what type of cell function has touch receptors and along with sensory nerve endings Merkel cells
What is the name for the deepest layer of the epidermis? Stratum Basale (basal layer)
What is the function of the stratum basale? Keratinocytes produce more (reproduction/regeneration
. Which layer of the epidermis accumulates granules and shows drastic changes to the keratinocytes? Statum granulosum
What is the function of lamellated granules? Slows water loss through skin and secrete glycolipid for waterproofing
Why do the cells of the upper layers of the epidermis die? Increased distance from dermal blood vessels, glycolipid coating, and filling with keratin
What layer of the epidermis Is present only in the thicker skin of the palms, fingertips, and soles of feet? Stratum lucidum
Between which two other layers is the stratum lucidum found? Stratum granulosum below it and stratum corneum above it
What is the outermost and thickest layer of the epidermis called? Stratum corneum
What are the functions of the stratum corneum? Waterproofing and protection from water loss · Protection from abrasion and penetration
Created by: Mari_gh22
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