chapter 5 copy - Anita Badro SCI101 Chapter 5 Tissues 5.1...

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Anita Badro 1-31-16 SCI101 Chapter 5 Tissues 5.1 Introduction 1. Define tissue. A tissue is a group of cells performing a specialized structural or functional role. 2. Describe three kinds of intercellular junctions. Tight junctions, desmosomes, and gap junctions 3. Which of the following is a major tissue type in the body? e. all of the above 5.2 Epithelial Tissues 4. A general characteristic of epithelial tissues is that _______________. c. cells divide rapidly 5. Distinguish between simple epithelium and stratified epithelium. Simple epithelium occurs as a single cell or a single sheet of cells. Stratified epithelium consists of layers of cells. 6. Explain how the structure of simple squamous epithelium provides its function. Simple squamous epithelium consists of a single layer of think, flattened cells. These fit together like floor tiles and the nuclei are broad and thin. Substances diffuse easily through this tissue. Because of this, simple squamous epithelium lines the alveoli of the lungs, forms the walls of capillaries, lines the insides of blood vessels, and covers the membranes that line body cavities. Because it is so thin, simple squamous epithelium is damaged easily. 7. Match the epithelial tissue on the left to an organ in which the tissue is found. 1. Simple squamous epithelium—E 2. Simple cuboidal epithelium—H 3. Simple columnar epithelium—A 4. Pseudostratified columnar epithelium—F 5. Stratified squamous epithelium—I 6. Stratified cuboidal epithelium—D 7. Stratified columnar epithelium—G 8. Transitional epithelium—C 9. Glandular epithelium—B
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8 . Distinguish between an exocrine gland and an endocrine gland. Exocrine glands secrete their products into ducts that open onto an internal or external surface. Endocrine glands secrete directly into tissue fluid or blood. 9 . Describe how glands are classified according to the structure of their ducts and the organization of their cells. A single cell can make up an exocrine gland. This is called a unicellular gland. If it is made up of two or more cells, it is called a multicellular gland. Multicellular glands can be further subdivided into two groups based upon their duct structure. A simple gland has an unbranched duct. A compound gland has a branched duct. These can be further classified into tubular glands (epithelial lined tubes), or acinar glands (saclikedilatations).
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  • Fall '13
  • Epithelial tissue

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