Epithelial Tissue

Simple squamous epithelium consists of

a single layer of flattened cells

Functions of simple epithelium?

absorption diffusion secretion

Cuboidal cells are shaped

as the name suggests, cube (square) shaped

All cells in a pseudostratified columnar epithelium actually touch the

basement membrane.

All cells of a pseudostratified epithelium are attached to the

basement membrane.

The point of attachment between the superficial epithelium and deeper connective tissue is called the

basement membrane.

Which of the following is NOT a major category of tissue in the body?

bone

Cytology is the study of

cells

Columnar cells are

ciliated, allowing the cells to move substances across the surface of the tissue.

Columnar cells have nuclei that are located

closer to the basal surface of the cell

Goblet cells are modified ____ that function as a unicellular gland.

columnar epithelial cells

Keratin is a protein that helps to form a protective barrier, preventing ___ while minimizing ___ to the underlying tissues

dehydration and infection friction and abrasion

In Simple squamous epithelium, there is only a single layer of thin cells so

diffusion can readily occur across this type of tissue

Avascular tissue that have cells comprised of epithelium that is Avascular acquire nutrients and vital substances through

diffusion from the underlying connective tissue layer

Stratified cuboidal epithelium is found in the

ducts of some sweat glands.

Columnar cells are shaped

elongated or rodlike

The cells of stratified squamous epithelium, form the

epidermis

The basement membrane, which is located between the

epithelial and connective tissue layers

Squamous cells are shaped

flat and irregularly

Columnar cells

form a fairly straight line when these cells are aligned side by side

Physiology focuses on the

functions of organs

apical surface

furthest from the basement membrane

Epithelial tissue __________.

is avascular

The cells of stratified squamous epithelium contain the protein

karatin so are said to be keratinized.

What protein does stratified epithelia cells produce?

keratin

Cuboidal cells function is to

lining glands and tubules, where they function in absorption and secretion

Stratified cuboidal epithelium is only found ___ and is typically arranged into

lining the ducts of some sweat glands Two layers of cells

Biology is a broad study that deals with

living things

Columnar cells may have a variety of modifications such as

microvilli and cilia at one end of the cell

Goblet cells secrete

mucus, which lubricates the apical (upper) surface of the gastrointestinal or respiratory lining and traps debris and other particles that are inhaled.

Pseudostratified organization of cells are arranged in

multiple layers because of the random arrangement of the nuclei within the cell

Stratified squamous epithelium consists of

multiple layers of cells

Columnar cells line the

nasal cavity, trachea, and bronchi-as well as the oviducts and parts of the male reproductive tract-

Neurology is the field that studies the

nervous system

Avascular means that there are

no blood vessels present in epithelial tissue.

Epithelia are classified and identified by ________ and ____________.

number of cell layers; general shape

The epithelium is found lining structures that

open either to the external environment, a body cavity, or an internal lumen (tubular structure).

Which of the following is NOT a function of simple epithelium?

protection

Squamous cells function is

protection, secretion, or diffusion

The function of stratified squamous epithelial tissue is to

provide a physical barrier to protect against chronic friction and abrasion, infection by pathogens, and chemical attack.

Functions of the epithelia include

providing physical protection controlling permeability absorption

Which type of epithelium lines the nasal cavity, the trachea, bronchi, and parts of the male reproductive tract?

pseudostratified columnar epithelium

Transitional epithelial tissue consists of

randomly shaped and sized cells in a stratified arrangement

What type of epithelium lines most of the digestive tract?

simple columnar

Which type of epithelium when viewed under a microscope appears to have cube-shaped cells organized into rings to form ducts and tubules?

simple cuboidal epithelia

Which type of epithelium lines the blood vessels and the heart chambers, and is also called the endothelium?

simple squamous epithelium

Most apical surfaces (furthest from the basement membrane) consist of

squamous cells

The functions of the epithelia include all of the following, EXCEPT _____________.

storing energy reserves

Which type of epithelium is found in parts of mammary glands?

stratified columnar epithelium

What type of epithelium appears to be two layers thick and looks like a doughnut?

stratified cuboidal epithelium

Which type of epithelium is uncommon and is found only in the ducts of certain sweat glands?

stratified cuboidal epithelium

This "category" of epithelia is found in areas exposed to abrasion and friction.

stratified epithelia

Areas of the body that are subject to chronic abrasion and friction often contain

stratified squamous epithelium

The skin, the vagina, and the mouth are all examples of body areas lined with

stratified squamous epithelium.

The basement membrane functions as a point of attachment and support for the

superficial epithelium

Pseudostratified is a term that describes

the organization of cells

Columnar cells are longer than

they are wide.

Which type of epithelium is found lining the urinary bladder?

transitional epithelium

Stratified transitional epithelium lines the

urinary bladder, allowing this organ to stretch then return to its original shape.

squamous

(thin and irregularly shaped)

apical

(upper)

What is the function of the basement membrane?

Adheres the superficial epithelial tissues onto underlying connective tissue.

Because Transitional epithelial tissues consist of randomly shaped and sized cells in a stratified arrangement, they can stretch and then shrink back to original shape. What organ uses Transitional epithelial?

Bladder when filled with urine and then shrink back to its original shape when the bladder is emptied.

The type of tissue that is typically found as a lining to a cavity or a covering to an organ is _____.

Epithelial

Goblet cells are located in the pseudostratified ciliated columnar epithelium lining the respiratory tract and in the simple columnar epithelium found in the stomach and small intestine. What is the function of goblet cells?

Goblet cells function as a unicellular mucus-secreting gland.

The field of study that focuses on tissues is _____.

Histology

Four major types of body tissues?

Neural Epithelial Connective Muscle

What lines the nasal cavity, trachea, and bronchi?

Pseudostratified ciliated columnar epithelium

Which type of tissue lines most of the gastrointestinal tract and the gallbladder?

Simple columnar epithelium

Which type of tissue is located in the thyroid gland and renal tubules?

Simple cuboidal epithelium

The lungs and blood vessels are areas in which rapid diffusion of gases and/or nutrients must occur. Based on anatomical structure, which type of tissue is most logically found in these areas?

Simple squamous epithelium

Which of the following statements is FALSE?

Simple squamous epithelium is most likely to line areas of the body that are subject to wear and tear such as the esophagus, vagina, and soles of the feet.

Nonkeratinized stratified squamous epithelium is found in all of the following areas of the body EXCEPT the

Skin

Which of the following is NOT one of the four major types of body tissue?

Skin

Which type of epithelial cell is flat and irregularly shaped and typically functions in protection, secretion, or diffusion?

Squamous

While observing a tissue under the microscope, you notice a few layers of column-shaped cells. The nuclei located within the cells are fairly evenly dispersed in the middle of the cell or closer to the basal surface. How would you classify this tissue?

Stratified columnar epithelium

While observing a tissue under the microscope, you notice two layers of cells that are more square shaped than round. How would you classify this tissue?

Stratified cuboidal epithelium

Which type of tissue provides a physical barrier that functions to protect against abrasion and attacks by pathogens and chemicals?

Stratified squamous epithelium

Epithelial tissues are avascular. How do the cells of this tissue obtain nutrients and other vital substances?

The cells of the epithelium acquire nutrients and other vital substances through diffusion from the underlying connective tissue layer.

Nonkeratinized stratified squamous epithelium is found in the

Tongue Anus Esophagus Vagina

What is the advantage to having transitional epithelium lining the urinary bladder?

Transitional tissue allows the urinary bladder to stretch when filled with urine and then shrink back to its original shape when the bladder is emptied.