BIOL 221 - Epithelium Lecture Objectives
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Questions and Answers

What is the basic unit of organization in the body?

  • Cell (correct)
  • Organ
  • Organ system
  • Tissue

Which tissue type is responsible for support in the body?

  • Epithelial
  • Nervous
  • Connective (correct)
  • Muscle

Where is epithelial tissue found in the body?

  • As a support tissue
  • For location and movement
  • In the brain and nerves
  • As a covering and lining (correct)

What are the distinctive characteristics of epithelium?

<p>Covering and lining (D)</p> Signup and view all the answers

Why does the mitotic rate in epithelium make it vulnerable to traditional chemotherapy?

<p>High mitotic rate makes it vulnerable to chemotherapy (D)</p> Signup and view all the answers

Which type of tissue is responsible for control and sensory functions in the body?

<p>Nervous (D)</p> Signup and view all the answers

Which type of epithelial tissue is characterized by cells that are close together and avascular?

<p>Squamous (B)</p> Signup and view all the answers

What is the function of simple squamous epithelia?

<p>Assistance in diffusion, osmosis, and filtration phenomena (A)</p> Signup and view all the answers

Where are ciliated types of columnar epithelial cells found?

<p>Respiratory tract bronchioles (A)</p> Signup and view all the answers

What is the characteristic shape of cuboidal epithelial cells?

<p>Cube-shaped (D)</p> Signup and view all the answers

Which type of epithelial tissue has a single layer where all cells touch the basement membrane and the outer surface or the lumen?

<p>Simple (C)</p> Signup and view all the answers

Where do most secretory cells of glands and most exocrine gland ducts have cuboidal epithelial cells?

<p>Kidney tubules (A)</p> Signup and view all the answers

In which type of epithelial tissue are more than one layer present but only the top layer is in contact with the surface?

<p>Stratified (A)</p> Signup and view all the answers

What is the main function of simple columnar epithelia with microvilli?

<p>'Secretory or absorptive functions' (C)</p> Signup and view all the answers

What is the main function of stratified epithelia?

<p>Cover exterior body surfaces (D)</p> Signup and view all the answers

Which type of columnar epithelial cells are found in the small bronchioles of the respiratory tract?

<p>Ciliated types (C)</p> Signup and view all the answers

Which type of connective tissue is found in the skin (dermis), bone, tendon, cartilage, and basement membranes?

<p>Dense irregular (C)</p> Signup and view all the answers

What are the main components of intercellular elements in connective tissue?

<p>Fibers, ground substance, tissue fluid (D)</p> Signup and view all the answers

Which type of connective tissue is characterized by large, wavy fibers often occurring in bundles and is very strong and flexible?

<p>Collagenous (A)</p> Signup and view all the answers

Which type of connective tissue is responsible for defense, transport, storage, and repair functions in the body?

<p>Blood (D)</p> Signup and view all the answers

What are the main types of fibers found in connective tissue?

<p>Reticular, collagenous, elastic (B)</p> Signup and view all the answers

Which category of connective tissue includes cartilage and bone?

<p>Supporting connective tissue (A)</p> Signup and view all the answers

What is the most abundant protein in the body?

<p>Collagen (A)</p> Signup and view all the answers

Which syndrome can result from mutations in collagen peptidase or lysyloxidase, and lysyl-hydroxylase deficiency?

<p>Ehlers-Danlos Syndrome (A)</p> Signup and view all the answers

What is the primary constituent of ground substance in connective tissue?

<p>Glycosaminoglycans (GAGs) (C)</p> Signup and view all the answers

Which type of fibers form delicate networks around smooth muscle, adipocytes, nerve fibers, and blood vessels?

<p>Reticular Fibers (D)</p> Signup and view all the answers

What is the characteristic of macrophages derived from monocytes?

<p>Large, lightly staining nucleus (A)</p> Signup and view all the answers

What is the primary function of elastin present in the body?

<p>Support and flexibility of connective tissue (D)</p> Signup and view all the answers

Which type of connective tissue cell is responsible for making collagen, elastin, and reticular fibers?

<p>Fibroblasts (C)</p> Signup and view all the answers

What is the structural framework (stroma) of the liver and spleen primarily composed of?

<p>Reticular Fibers (D)</p> Signup and view all the answers

What do integrins do in connective tissue?

<p>Aid in migration of cells along collagen fibers and bind to glycoproteins. (A)</p> Signup and view all the answers

What is the overall incidence of Ehlers-Danlos syndrome (EDS)?

<p>1 in 5,000 to 1 in 10,000 (A)</p> Signup and view all the answers

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