McGraw-Hill Connect Epithelial Tissue Homework

Collections of specialized cells and the extracellular substances surrounding them are -molecules. -organs. -tissues. -organ systems.

tissues

Most epithelial tissues have one free, __________ surface not attached to other cells.

apical

Most epithelial tissues have one free, or __________ surface and a __________ surface that is attached to a basement membrane. -basal; apical -apical; lateral -apical; basal -lateral; apical

apical; basal

The basal surface of most epithelial tissues is attached to a __________ membrane, a specialized type of extracellular material secreted by epithelial and and connective tissue cells.

basement

Blood vessels in the underlying connective tissue do not penetrate the basement membrane; thus all gases and nutrients carried in the blood must reach the epithelium by __________ .

diffusion

Epithelial tissue, or __________ covers and protects surfaces, both outside and inside the body.

epithelium

Glands with ducts are called __________ glands and glands that do not have ducts are __________ glands. -endocrine; exocrine -merocrine; exocrine -exocrine; endocrine -apocrine; exocrine

exocrine; endocrine

The body surfaces include the __________ surface and the lining of the digestive and respiratory tracts and many body cavities.

exterior

Epithelial tissue consists almost entirely of cells, with very little __________ between them.

extracellular matrix

Epithelial tissue covers body surfaces and forms __________ that are derived developmentally from body surfaces.

glands

The basement membrane helps attach the epithelial cells to underlying tissues, and it plays an important role in supporting and guiding cell __________ during tissue repair.

migration

Epithelial cells retain the ability to undergo __________ and therefore are able to replace damaged cells with new epithelial cells.

mitosis

Match the description with the correct cell specialization. 1. Allow adjacent cells to communicate with each other. 2. Disk-shaped structures with especially adhesive glycoproteins. 3. Hold cells together and form a permability barrier. 4. Elongated microvilli found in sensory structures. 5. Move materials across the free surface of cell. 6. Nonmotile and increase surface area of the cell.

1. Allow adjacent cells to communicate with each other: Gap junctions 2. Disk-shaped structures with especially adhesive glycoproteins: Desmosomes 3. Hold cells together and form a permability barrier: Tight junctions 4. Elongated microvilli found in sensory structures: Stereocilia 5. Move materials across the free surface of cell: Cilia 6. Nonmotile and increase surface area of the cell: Microvilli

Place a single word into each sentence to make it correct then place each sentence into a logical paragraph order.

1. Epithelial tissue can be classified according to cell shape and number of layers. 2. One layer of cells is called simple and more than one layer is called stratified. 3. Thin, flat, scaly cells are squamous. 4. Cuboidal cells are either rounded or square in shape. 5. Columnar cells are tall and thin. 6. Pseudostratified look like more than one layer because of the arrangement of the cells' nuclei.

Indicate whether each statement is true or false. 1. Desmosomes, hemidesmosomes and tight junctions anchor cells to one another. 2. Hemidesmosomes are similar to one-half of a desmosome and attach epithelial cells to the basement membrane. 3. Gap junctions are small specialized contact regions between cells containing protein channels that allow ions and large molecules to pass from one cell to another. 4. An adhesion belt of glycoproteins is found just below a tight junction and acts as weak glue that holds cells together.

1. FALSE 2. TRUE 3. FALSE 4. TRUE

Match the function or location to the correct epithelial tissue. 1. Lining of blood vessels and alveoli of lungs 2. Kidney tubules, secretory cells of glands 3. Absorption in the small and large intestines 4. Protection against abrasion, barrier against infection 5. Sweat gland ducts, ovarian follicular cells 6. Mammary gland ducts, larynx, parts of the male urethra 7. Lining of the nasal cavity, pharynx and trachea 8. Lining of the urinary bladder and ureters

1. Lining of blood vessels and alveoli of lungs: Simple squamous 2. Kidney tubules, secretory cells of glands: Simple cuboidal 3. Absorption in the small and large intestines: Simple columnar 4. Protection against abrasion, barrier against infection: Stratified squamous 5. Sweat gland ducts, ovarian follicular cells: Stratified cuboidal 6. Mammary gland ducts, larynx, parts of the male urethra: Stratified columnar 7. Lining of the nasal cavity, pharynx and trachea: Pseudostratifed columnar 8. Lining of the urinary bladder and ureters: Transitional

True or False: Which statements are characteristics of epithelial tissue? 1. Mostly composed of cells and has little extra cellular matrix. 2. Covers body surfaces and forms glands. 3. Has abundant extra cellular matrix and very few cells. 4. Is the most abundant primary tissue type. 5. Is avascular and receives its nutrients by diffusion. 6. Most cells are bound together and have apical, lateral and basal surfaces. 7. Can be avascular, have poor vascularity, or very vascular based upon location.

1. Mostly composed of cells and has little extra cellular matrix. TRUE 2. Covers body surfaces and forms glands. TRUE 3. Has abundant extra cellular matrix and very few cells. FALSE 4. Is the most abundant primary tissue type. FALSE 5. Is avascular and receives its nutrients by diffusion. TRUE 6. Most cells are bound together and have apical, lateral and basal surfaces. TRUE 7. Can be avascular, have poor vascularity, or very vascular based upon location. FALSE

Match the epithelial tissue with the appropriate description. 1. One layer of flat, or scale-like cells that rest on a basement membrane 2. Many layers of cells where the cells near the basement membrane are cube shaped, but at the free surface are flat 3. One layer of cells that are as wide as they are tall that rest on a basement membrane 4. Many layers of cells where most cells are as wide as they are tall 5. Special type of simple epithelium where it appears to be stratified but is not 6. One layer of cells that are taller than they are wide where almost all cells touch the basement membrane and extend to the free surface

1. Simple squamous 2. Stratified squamous 3. Simple cuboidal 4. Stratified cuboidal 5. Pseudostratified columnar 6. Simple columnar

Indicate whether each statement is true or false. 1. Epithelial tissue consist almost entirely of cells, with very little extracellular matrix between them. 2. Epithelial tissues typically have cells with a basal surface that is attached to an apical membrane that attaches epithelial cells to underlying tissues. 3. Nutrients, oxygen, and waste products must be transported to and from epithelial tissue by diffusion because it lacks blood vessels. 4. The free surface of epithelial tissue is often found lining the lumen of ducts, vessels, and cavities. 5. Epithelial tissue is unable to undergo mitosis therefore it is unable to regenerate to replace damaged cells.

1. TRUE 2. FALSE 3. TRUE 4. TRUE 5. FALSE

rue or False: Each of these is a structural specialization of epithelial tissue. 1. Cilia 2. Microvilli 3. Flagella 4. Stereocilia

1. TRUE 2. TRUE 3. FALSE 4. TRUE

True or False: Each is a primary tissue type in the body. 1. integumentary 2. connective 3. muscular 4. epithelial 5. skeletal 6. nervous

1. integumentary FALSE 2. connective TRUE 3. muscular TRUE 4. epithelial TRUE 5. skeletal FALSE 6. nervous TRUE

True or False: All of these statements describe functions of epithelial tissues. Absorbs substances Secretes substances Stores fat Acts as a barrier Transports nutrients Protects underlying structures Permits passage of substances Conveys electrical impulses

Absorbs substances TRUE Secretes substances TRUE Stores fat FALSE Acts as a barrier TRUE Transports nutrients FALSE Protects underlying structures TRUE Permits passage of substances TRUE Conveys electrical impulses FALSE