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Lab Report 3 Body Membranes

Lab Report 3 Body Membranes - AP-1 Lab 03 Lab Report Name...

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AP-1 Lab 03 – Lab Report Name: Robin Davis Section: DL 1 Laboratory Report: Exercise 3: Body Membranes Purpose: What is the purpose of this exercise? Are there any safety concerns associated with this exercise? If so, list what they are and what precautions should be taken. No safety concerns. Purpose of this exercise is to learn the functions and locations of the membrane types in the human body. Activity 1: The Microscopic Structure of Cutaneous Membranes Observations: Draw your sketch of keratinized stratified squamous epithelium here. Label the keratinized layer. Describe the structures and cells you observed. (SEE PHOTO) QUESTIONS: 1. What is keratin? Keratin is a tough, fibrous, protein substance found in hair, nails, outer skin cells and horny tissue. 2. Why is your skin keratinized? Keratinized layer of skin is responsible for keeping water in the body and keeping other harmful chemicals and pathogens out. It acts as a barrier for harmful substances. Activity 2: Microscopic Structure of Mucous Membranes Draw your observations of the following tissues and describe the cells and structures you observed: Mucosa of Trachea Mucosa of Esophagus Mucosa of Small Intestine (See Photos) 1
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QUESTIONS: A. Compare and contrast the roles of the three mucous membranes.
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