32 Questions
What is the basic unit of organization in the body?
Cell
Which tissue type is responsible for support in the body?
Connective
Where is epithelial tissue found in the body?
As a covering and lining
What are the distinctive characteristics of epithelium?
Covering and lining
Why does the mitotic rate in epithelium make it vulnerable to traditional chemotherapy?
High mitotic rate makes it vulnerable to chemotherapy
Which type of tissue is responsible for control and sensory functions in the body?
Nervous
Which type of epithelial tissue is characterized by cells that are close together and avascular?
Squamous
What is the function of simple squamous epithelia?
Assistance in diffusion, osmosis, and filtration phenomena
Where are ciliated types of columnar epithelial cells found?
Respiratory tract bronchioles
What is the characteristic shape of cuboidal epithelial cells?
Cube-shaped
Which type of epithelial tissue has a single layer where all cells touch the basement membrane and the outer surface or the lumen?
Simple
Where do most secretory cells of glands and most exocrine gland ducts have cuboidal epithelial cells?
Kidney tubules
In which type of epithelial tissue are more than one layer present but only the top layer is in contact with the surface?
Stratified
What is the main function of simple columnar epithelia with microvilli?
'Secretory or absorptive functions'
What is the main function of stratified epithelia?
Cover exterior body surfaces
Which type of columnar epithelial cells are found in the small bronchioles of the respiratory tract?
Ciliated types
Which type of connective tissue is found in the skin (dermis), bone, tendon, cartilage, and basement membranes?
Dense irregular
What are the main components of intercellular elements in connective tissue?
Fibers, ground substance, tissue fluid
Which type of connective tissue is characterized by large, wavy fibers often occurring in bundles and is very strong and flexible?
Collagenous
Which type of connective tissue is responsible for defense, transport, storage, and repair functions in the body?
Blood
What are the main types of fibers found in connective tissue?
Reticular, collagenous, elastic
Which category of connective tissue includes cartilage and bone?
Supporting connective tissue
What is the most abundant protein in the body?
Collagen
Which syndrome can result from mutations in collagen peptidase or lysyloxidase, and lysyl-hydroxylase deficiency?
Ehlers-Danlos Syndrome
What is the primary constituent of ground substance in connective tissue?
Glycosaminoglycans (GAGs)
Which type of fibers form delicate networks around smooth muscle, adipocytes, nerve fibers, and blood vessels?
Reticular Fibers
What is the characteristic of macrophages derived from monocytes?
Large, lightly staining nucleus
What is the primary function of elastin present in the body?
Support and flexibility of connective tissue
Which type of connective tissue cell is responsible for making collagen, elastin, and reticular fibers?
Fibroblasts
What is the structural framework (stroma) of the liver and spleen primarily composed of?
Reticular Fibers
What do integrins do in connective tissue?
Aid in migration of cells along collagen fibers and bind to glycoproteins.
What is the overall incidence of Ehlers-Danlos syndrome (EDS)?
1 in 5,000 to 1 in 10,000
Test your understanding of the lecture objectives for BIOL 221 - Epithelium. Topics include organization levels in the body, basic tissue types, functions and locations of epithelial tissues, types of secretion, distinctive characteristics, cell shapes and layering variations, and locations of different epithelium in the body.
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