Lab 5 Quiz - Question 1 The first three questions and...

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Question 1 The first three questions and images are about the same microscope slide. This firs image is a picture of a cross-section of the intestinal wall. The second image is a higher-magnification view of the same slide, but, in the interests of taking less vertical space, the image has been rotated 90 degrees. The image in question three is of the same tissue as is found indicated by bracket C in the above pic. Additional information may be found in Ch 17 of your text (pp. 652-654, 12th ed). Please note that the layers are described from the inside towards the outside. From the exterior surface (top of the picture) to the internal surface (bottom) are four different layers. Layer D1 is the . Layer D2 is the . Layer D3 is the , and layer D4 is the The thin tissue covering the exterior of the structure at letter A (and E1 in the picture of column 2) is . If you are unsure of the shape of the cells, go to the Photomicrograph Set 1 document, and view at 200%. The brownish-red structures are the nuclei of flat cells lying on the surface of a non- living extracellular matrix of fibers. At the bottom left of the image is a capillary. Nearly all of the tissue which is found in layer D2 (second from the outside) consists of . Layer D3 is made primarily of but also contains blood vessels, nerves and lymphatic vessels. Layer D4 consists of tissue C, which is (see page 146). Marks for this submission: 8/8. Question 2 This is a higher magnification view of part of the slide shown in the first image above.E1 and E2 together form the . It is described in the "Structure of the Wall" section on page 654 of the 12th edition. The reddish ovals in E1 are the of the . Please look at section 5.2 Epithelial Tissues starting p144. Please remember that all possible places a tissue may be found are not listed. Examples are representative, not all-inclusive! E2 is or basal lamina.
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The type of tissue shown at E3 consists of cells of . See the picture in the first question for orientation if necessary. E4 shows cells of .Together, layers E3 and E4 make up the layer. The tissue at E5 contains many collagen and elastin fibers produced by cells called .It is or . A close look at E6 (Zoom to 200% on the Word version) shows what looks like two layers of block-like cells. That suggests that the tissue is , a tissue that associated with glandular secretions ( Brunner's glands in this case). Because of the layering, this tissue is Marks for this submission: 14/14. Question 3 This tissue is found on the innermost surface of the intestinal wall, and is viewed using 400X magnifications. It shows two specialized cell types, the majority of tall, thin cells, and two complete secretory cells. The reddish oval structures with numerous darker areas are the nuclei of the (NOT pseudostratified ciliated columnar epithelium / transitional epithelium / stratified columnar epithelium lining the digestive organs.The darker ovals within the nuclei are likely that function as the site of (Review "Cytoplasm" p82
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Lab 5 Quiz - Question 1 The first three questions and...

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