L1 Tissues Chapter 4

L1 Tissues Chapter 4 - Tissues Chapter 4 1 What is the...

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Tissues: Chapter 4 1. What is the purpose of fixing tissue for microscopic viewing? Fixing tissue preserves it and prevents is from deteriorating. 2. What types of stains are used to stain tissues to be viewed with an electron microscope? Organic dyes are used to stain tissues viewed by electron microscopes. 3. Epithelial tissue is the only tissue type that has polarity, that is, an apical and a basal surface. Why is this important? Epithelial tissue lines body cavities and covers the body’s external surface; thus polarity with one free (apical) surface is a requirement. 4. Which of the following properties apply to epithelial tissue? Has blood vessels, can repair itself (regenerates), cells joined by lateral contacts. Epithelial tissue can regenerate and its cells are joined by lateral contacts. 5. Stratified epithelia are “built” for protection or to resist abrasion. What are the simple epithelia better at? Simple epithelia are “built” to provide for efficient absorption and filtration across their thin epithelial barriers. 6. Some epithelia are pseudostratified. What does this mean? Pseudostratified epithelia appear to be stratified because their cells’ nuclei lie at different distances from the basement membrane. However, all cells rest on the basement
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L1 Tissues Chapter 4 - Tissues Chapter 4 1 What is the...

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