A&P Epithelial Tissues
Which description is best for transitional epithelium?
Cells that are more cuboidal in a relaxed state but more squamous when stretched.
Squamous epithelial cells... a. are taller than they are wide, like columns b. are as tall as they are wide, like cubes c. have no nuclei d. are thin and flat, like fish scales
d. are thin and flat, like fish scales
Which of the following is a modification of the simple columnar epithelium that allows for efficient absorption along portions of the digestive tract?
dense microvilli
Identify the function of transitional epithelium.
flexibility
What structures are highlighted?
microvilli
What structures are highlighted?
nuclei
Identify the best description for the shape of squamous cells.
plate-like
What structures are highlighted?
simple columnar
What structures are highlighted?
simple cuboidal
Which of the following epithelia forms the walls of the air sacs across which gas exchange occurs in the lungs?
simple squamous
A many-layered epithelium with cuboidal basal cells and flat cells at its surface would be classified as
stratified squamous
What structures are highlighted?
stratified squamous epithelium
Which of these are visible characteristics of stratified squamous epithelium?
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, There are so many layers of cells that it would be difficult to count them precisely.
What structures are highlighted?
basement membrane
What structures are highlighted?
cilia
A ciliated version of pseudostratified columnar epithelium containing mucus-secreting goblet cells... a. aids in digestion b. is found in some of the larger glands c. is more durable than all other epithelia d. lines most of the respiratory tract
d. lines most of the respiratory tract
Which of the following epithelial tissue types is NOT correctly matched to its function? a. simple squamous epithelium; filtration b. simple cuboidal epithelium; secretion c. simple columnar epithelium with microvilli; absorption d. stratified squamous epithelium; absorption
d. stratified squamous epithelium; absorption
Which of the following best describes pseudostratified epithelium? a. Multiple layers of ciliated cells b. Single layer of columnar cells c. Multiple layers of cells with various heights d. Multiple layers of cuboidal and columnar cells e. Single layer of cells with various heights
e. Single layer of cells with various heights
T/F Pseudostratified epithelia are well adapted to the digestive system because the cilia increase the surface area for absorption.
false
Identify the primary function(s) of simple squamous epithelium cells.
filtration and diffusion
Where is ciliated pseudostratified columnar epithelium found in the body?
lining the trachea, lining large bronchi, lining the nasal cavity
What is the function of stratified squamous epithelium?
protection
What structures are highlighted?
pseudostratified columnar epithelium
What body system contains pseudostratified columnar epithelium?
respiratory system
What function do transitional epithelia have?
stretching
What structures are highlighted?
transitional epithelium
T/F Simple cuboidal epithelia are usually found in areas where secretion and absorption occur.
true
You observe a tissue under a microscope. There appears to be a lumen on one side of the tissue. Lining this lumen is a single layer of epithelial cells that seem to have long, fingerlike projections. Beneath the projections, the cells seem to have the shape of shoeboxes and are packed tightly together. What type of tissue are you looking at? a. simple columnar epithelium b. stratified squamous epithelium c. transitional epithelium d. simple cuboidal epithelium
a. simple columnar epithelium
Identify the primary functions of simple columnar epithelium.
absorption and secretion
Select the correct statement regarding epithelia. a. Simple epithelia form impermeable barriers. b. Stratified epithelia are present where protection from abrasion is important. c. Pseudostratified epithelia consist of at least two layers of cells stacked on top of one another. d. Stratified epithelia are tall, narrow cells.
b. Stratified epithelia are present where protection from abrasion is important.
Simple epithelia have... a. all three types of epithelial cells arranged in one layer b. multiple layers of just one type of epithelial cells c. one type of epithelial cell, arranged in a single layer d. two types of epithelial cells, arranged in one layer
c. one type of epithelial cell, arranged in a single layer
Identify the one characteristic that does NOT describe a goblet cell.
component of a mucous gland
Identify the functions of ciliated pseudostratified columnar epithelium.
secretion and movement
A single layer of tall rectangular cells best describes which of the following?
simple columnar epithelium
What structures are highlighted?
simple columnar epithelium
What is the only body system that contains transitional epithelium?
urinary system
Where is simple squamous epithelium found in the body?
Air sacs of the lungs, Lining of blood vessels, Kidneys (glomerular capsule)
Where is the basement membrane located?
At the boundary between connective tissue and epithelium
What are the visible characteristics of ciliated pseudostratified columnar epithelium?
Goblet cells are columnar cells that can be seen interspersed within the tissue, Cilia project from the apical surface into the lumen, The nuclei are found in multiple planes, giving the illusion of multiple cell layers.
Where is stratified squamous epithelium found in the body?
Lining of the esophagus, Epidermis, Lining of the vagina
Where is transitional epithelium found in the body?
Lining of the urinary bladder, Lining of the ureters, Lining of the proximal portion of the urethra
Where is simple columnar epithelium found in the body?
Lining the small and large intestine, Lining the uterine (fallopian) tubes, Lining the stomach
What is the function of cilia?
Movement of something across the cell's surface
BLANK epithelium appears to have two or three layers of cells, but all the cells are in contact with the basement membrane.
Pseudostratified columnar
What are the visible characteristics of transitional epithelium?
Rounded apical surfaces that resemble a tombstone shape, Neighbors a hollow cavity called the lumen, Multiple layers of cells.
Describe the apical surface.
Secretions from goblet cells are released from the apical surface of a cell, The apical surface is sometimes covered with cilia, The apical surface is closest to or on the luminal surface.
Which of these are characteristics of simple squamous epithelium?
Simple squamous epithelium is found next to free space called the lumen, Simple squamous cells attach to form a sheet-like arrangement.
Having multiple layers of flat cells against a free surface describes which of the following?
Stratified squamous epithelium
