Unit 3 HW7_ Epithelial Tissue

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Unit 3 HW7: Epithelial Tissue Due: 11:59pm on Wednesday, November 1, 2023 You will receive no credit for items you complete after the assignment is due. Grading Policy Art-labeling Activity: Figure 6.2 Label the classes of epithelia, based on number of cell layers and cell shape. Part A Drag the labels onto the diagram to identify the classes of epithelia based on number of cell layers and cell shape. ANSWER: Correct Microscopic Appearance of Stratified Squamous Epithelium Watch the video and answer the following questions. Help Reset Basal surface Cuboidal cell Apical surface Simple Squamous cell Columnar cell Stratified
Part A Having multiple layers of flat cells against a free surface describes which of the following? Hint 1. There are two key hints right in the question. Epithelium is named according the number of layers and the cell shape. ANSWER: Correct Great job! Multiple layers of flat cells are known as stratified squamous epithelium. Part B Where is the basement membrane located? Hint 1. Where does the basement membrane come from? The basement membrane is generated by both epithelial and connective tissues; therefore, the basement membrane is in contact with both epithelial and connective tissues. ANSWER: Correct The basement membrane can be seen on many microscope slides, separating epithelium from connective tissue. Part C Simple squamous epithelium Pseudostratified squamous epithelium Stratified cuboidal epithelium Simple cuboidal epithelium Stratified squamous epithelium At the boundary between connective tissue and epithelium At the basal surface of each epithelial cell At the boundary between the lumen and connective tissue Between neighboring epithelial cells Across the apical surfaces of the epithelial cells
Which of these are visible characteristics of stratified squamous epithelium? Select all that apply. Hint 1. Visible characteristics are features that allow us to recognize stratified squamous epithelium when we see it. Recall the various features you can see when looking at stratified squamous epithelium under the microscope. ANSWER: Correct Looks like you could easily identify stratified squamous epithelium on a microscope slide. Good work! Part D What is the function of stratified squamous epithelium? Hint 1. The number of cell layers hints at the function of this tissue. Stratified squamous epithelium consists of many stacked cell layers. ANSWER: Correct The numerous cell layers that compose stratified squamous epithelium provide protection, which makes a perfect tissue type to cover the surface of the body. Part E Where is stratified squamous epithelium found in the body? Select all that apply. Hint 1. The function of this tissue hints at the locations. Stratified squamous epithelium provides protection and is found covering the body and lining some internal passageways. ANSWER: The boundary between stratified squamous epithelium and connective tissue is indistinct and hard to see. The squamous cells closer to the lumen are fuller and rounder while the squamous cells closer to the connective tissue are flatter. There are so many layers of cells that it would be difficult to count them precisely. The squamous cells closer to the lumen are flatter while the squamous cells closer to the connective tissue are fuller and rounder. Stratified squamous epithelium is always adjacent to a free space or lumen. Filtration Secretion Protection Absorption Diffusion
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All attempts used; correct answer displayed Great job! Common locations of stratified squamous epithelium are the epidermis, esophagus, oral cavity, pharynx, and vagina. Lab Manual Exercise 6 Pre-Lab Question 1 Part A Epithelial tissues can be classified according to cell shape. __________ epithelial cells are scalelike and flattened. ANSWER: Correct Epithelial Tissue cells and specializations Part A Which of the following shapes of cells, when in a simple epithelium, is the most protective? ANSWER: Correct Part B Is pseudostratified epithelium simple or stratified? ANSWER: Lining of the vagina Epidermis Dermis Lining of the urinary bladder Lining of the esophagus Cuboidal Columnar Squamous Transitional columnar cuboidal squamous
Correct Part C Which of these apical specializations is also called a brush border? ANSWER: Correct Part D Which type of apical specialization tends to be as long as a nucleus is tall? ANSWER: Correct Part E You are looking at an epithelial cell and the nucleus appears to be floating around in the middle of the cell. Which cell shape is that cell? ANSWER: Correct Part F You are looking at an epithelial cell and the nucleus is found closer to the basal edge of the cell. Which cell shape is that cell? ANSWER: stratified simple microvilli cilia cilia microvilli cuboidal columnar squamous columnar squamous cuboidal
Correct Part G Which side of an epithelial cell would be attached to the basement membrane? ANSWER: Correct Epithelial Tissues and Locations Part A You looked at micrographs of the bladder. This epithelium has to stretch (as it fills) and shrink (as it expels). Which type of epithelium is found lining this organ? ANSWER: Correct Part B The alveoli (air sacs) of the lungs are coated in this type of epithelium. ANSWER: Correct Part C Where did you find simple cuboidal epithelium? apical edge basal edge simple columnar stratified squamous simple cuboidal stratified cuboidal transitional simple squamous simple columnar pseudostratified simple cuboidal
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ANSWER: Correct Part D There are two types of epithelial tissue that you are not expected to master at this time because they are quite difficult to see for a beginner. Which two types of epithelial tissue are these? ANSWER: Correct Part E Which of these four types of epithelia is the most difficult of these 4 to see well under the microscope? ANSWER: Correct Score Summary: Your score on this assignment is 59.7%. You received 59.73 out of a possible total of 100 points. intestinal lining kidney tubules skin epidermis trachea simple columnar pseudostratified stratified squamous stratified columnar transitional stratified cuboidal simple squamous simple cuboidal stratified squamous pseudostratified simple columnar simple squamous