Unit 3 Homework 8 Tissue

12/15/22, 8:43 PM Unit 3 HW8: Tissues Unit 3 HW8: Tissues Due: 11:59pm on Friday, November 4, 2022 Art-based Question Exercise 6 Question 1 Part A Marfan's syndrome is a disease associated with faulty manufacture of the extracellular protein fibrillin. Since this is a component of elastin, in which of the numbered cells would the damaged gene be expressed? ANSWER: 2 3 4 5 Correct Cell 2 is a fibroblast, which is the primary producer of the major fibers (including elastin and fibrillin) in connective tissue proper. It can be identified by its numerous cell extensions. 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: 1/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Reset Help Squamous cell Simple Cuboidal cell Apical surface Basal surface Stratified Columnar cell Correct Art-based Question Exercise 6 Question 2 Part A What activity does cell 1 undertake to contribute to the body's defense against injury and infection? ANSWER: 2/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues differentiation to form red blood cells synthesis of protein fibers used to rebuild damaged tissue phagocytosis of foreign materials secretion of chemicals that trigger inflammation Correct Cell 1 is a macrophage, which phagocytizes foreign materials such as bacteria and debris. It can be identified by its large size. Art-based Question Exercise 6 Question 3 Part A Which numbered cell type initiates inflammatory responses to infection or tissue damage? ANSWER: 3 4 5 6 Correct Cell 5 is a mast cell, which produces and secretes inflammation-triggering chemicals, such as histamine. Note the secretory granules within the pictured cell. Art-based Question Exercise 6 Question 4 Part A 3/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Which of these terms applies best to all material in this tissue that is not cellular? ANSWER: ground substance mesenchyme matrix interstitial fluid Correct The term matrix applies to all extracellular material seen, including the ground substance and all fibers. Art-based Question Exercise 6 Question 5 Part A Which of the following characteristics is lacking in the typical areolar connective tissue pictured in the figure? ANSWER: 4/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues vascularity elastic properties ability to support other tissues ground substance None of these characteristics is lacking. Correct This tissue has all of these abilities. Microscopic Appearance of Stratified Squamous Epithelium 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: Simple cuboidal epithelium Stratified cuboidal epithelium Simple squamous epithelium Stratified squamous epithelium Pseudostratified squamous epithelium 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: 5/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues At the basal surface of each epithelial cell Across the apical surfaces of the epithelial cells At the boundary between connective tissue and epithelium Between neighboring epithelial cells At the boundary between the lumen and connective tissue Correct The basement membrane can be seen on many microscope slides, separating epithelium from connective tissue. Part C 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: The squamous cells closer to the lumen are fuller and rounder while the squamous cells closer to the connective tissue are flatter. The boundary between stratified squamous epithelium and connective tissue is indistinct and hard to see. Stratified squamous epithelium is always adjacent to a free space or lumen. The squamous cells closer to the lumen are flatter while the squamous cells closer to the connective tissue are fuller and rounder. There are so many layers of cells that it would be difficult to count them precisely. 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: Diffusion Protection Absorption Secretion Filtration 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. 6/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues 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: Lining of the esophagus Dermis Lining of the urinary bladder Lining of the vagina Epidermis Correct Great job! Common locations of stratified squamous epithelium are the epidermis, esophagus, oral cavity, pharynx, and vagina. Art-labeling Activity: Figure 6.4 Label the cell types and matrix components of areolar connective tissue, a model connective tissue. Part A Drag the labels onto the diagram to identify the cell types and matrix components of areolar connective tissue, a model connective tissue. ANSWER: 7/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Reset Help Ground substance Macrophage Collagen fiber Elastic fiber Reticular fiber Fibroblast Lymphocyte Fat cell Capillary Mast cell Neutrophil Correct Lab Manual Exercise 6 Pre-Lab Question 4 Part A Of the two major cell types found in nervous tissue, __________ cells are highly specialized to generate and conduct electrical signals. ANSWER: neurons neuroglial Correct Lab Manual Exercise 6 Pre-Lab Question 5 8/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Part A How many basic types of muscle tissue are there? __________ ANSWER: 3 Correct 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: Columnar Transitional Squamous Cuboidal Correct Lab Manual Exercise 6 Pre-Lab Question 2 Part A All connective tissue is derived from an embryonic tissue known as __________. ANSWER: cartilage mesenchyme ground substance reticular Correct Microscopic Appearance of Areolar Connective Tissue 9/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Part A What type of connective tissue is areolar connective tissue? Hint 1. Connective tissue is categorized based on the viscosity of the matrix. Areolar connective tissue is the most common type of connective tissue within this organizational category. ANSWER: Dense regular connective tissue Dense irregular connective tissue Loose connective tissue Dense connective tissue Cartilage Correct Areolar connective tissue is the most common type of loose connective tissue, so it is often just referred to as that; areolar connective tissue and loose connective tissue refer to the same tissue. Good job! Part B What are the visible characteristics of areolar connective tissue? Select all that apply. Hint 1. What features do you recognize in areolar connective tissue? Focus on what you can actually see in an image (or within your microscope field of view) that helps you figure out the tissue type. ANSWER: Multiple types of fibers running in different directions. Multiple cell types are present. Cells are packed in tight together so that neighboring cells contact each other. All the fiber types present can be observed on a microscope slide. Fibers create an observable woven or web-type pattern. Correct Looks like you could easily identify areolar connective tissue on a microscope slide. Good job! Part C Identify the primary functions of areolar connective tissue. Select all that apply. 10/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Hint 1. Basic purpose of connective tissue applies to areolar connective tissue. Areolar connective tissue is the prototypical connective tissue type. ANSWER: Protects the epidermis Connects muscle to bone Resists compression Supports epithelium Connects different tissue types Correct Great job! Areolar connective tissue is a basic loose connective tissue that binds tissues together in the skin, mucous membranes, and hollow organs. Part D Where is areolar connective tissue found in the body? Select all that apply. Hint 1. The function of this tissue hints at the locations. Areolar connective tissue is a basic loose connective tissue that binds tissues together in the skin, mucous membranes, and hollow organs. ANSWER: Underlying the epithelium of the esophagus Capping the ends of bone Deep regions of the dermis Underlying the epithelium of the trachea Underlying the epidermis Correct Great job! Most regions of the body contain areolar connective. Part E What fiber type permits areolar connective tissue to retain a degree of flexibility? Hint 1. Which fiber type can stretch? The three fiber types found in connective tissue are collagen fibers, elastic fibers, and reticular fibers. Every connective tissue contains at least one of these three fiber types. ANSWER: Collagen Elastic Reticular 11/12 12/15/22, 8:43 PM Unit 3 HW8: Tissues Correct Great job! The presence of elastic fibers in areolar tissue makes elasticity one of its characteristics. Score Summary: Your score on this assignment is 0.0%. You received 0 out of a possible total of 100 points. 12/12