Lesson 06 Assignment

Lesson 06 Assignment - Lesson 06 Assignment 1. Match the...

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Lesson 06 Assignment 1. Match the following age-related skin conditions with the appropriate letter:  1. lentigo 2. dermatitis 3. pruritis 4. keratosis 5. herpes A. red, scaly lesions B. caused by virus C. any skin inflammation D. senile freckles E. itching Correct Answer: A:4, B:5, C:2, D:1, E:3 2. Describe the three main structural components of skin. Be sure to include important cells and  fibers in this description. Correct  Answer: The three principle structural components of the skin are the epidermis, dermis, and  hypodermis.  The epidermis is a thick layer of stratified squamous epithelial cells that are not actually  penetrated by blood vessels. The principle structural cell is a keratinocyte that secretes a  waxy, waterproof protein called keratin. There is a deep layer of rapidly dividing cells  (stratum basalum or germinativum) that replenishes the epidermis continuously  throughout life. Cells called melanocytes produce the pigment melanin, which colors skin  and also causes tanning. The top layer of the epidermis is called the stratum corneum 
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This note was uploaded on 03/26/2008 for the course BIOL 155 taught by Professor Agnewrobertlain during the Spring '08 term at Penn State.

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Lesson 06 Assignment - Lesson 06 Assignment 1. Match the...

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