Part ll: Body Tissues and Section 3.4 Epithelial Tissue
Where is stratified squamous epithelium found in the body?
Epidermis Lining of the esophagus Lining of the vagina
Which of the following is not a hallmark feature of epithelial tissues?
Epithelial tissues are well vascularized.
Identify the function of transitional epithelium.
Flexiblity
What body system contains pseudostratified columnar epithelium?
Respiratory system
Having multiple layers of flat cells against a free surface describes which of the following?
Stratified squamous epithelium
Where is simple cuboidal epithelium found in the body?
Thyroid follicles and Kidney tubules
What is the only body system that contains transitional epithelium?
Urinary system
How would you interpret a micrograph that shows a cuboidal cell without a nucleus?
When preparing the slide, the blade did not cut through the nucleus.
What is the function of stratified squamous epithelium?
protection
Groups of cells that are similar in both structure and function are known as ________.
tissues
Which of these are characteristics of simple cuboidal epithelium?
Simple cuboidal epithelium frequently forms tubular or spherical structures in the body. Simple cuboidal epithelium is found next to free space called the lumen Simple cuboidal epithelium consists of a single layer of cube-shaped cells.
A tissue constructed of a single layer of flattened cells is known as
simple squamous epithelium
Where is the basement membrane located?
At the boundary between connective tissue and epithelium
Which description is best for transitional epithelium?
Cells that are more cuboidal in a relaxed state but more squamous when stretched.
Identify the functions of ciliated pseudostratified columnar epithelium.
Movement and secretion
A single layer of tall rectangular cells best describes which of the following?
Simple columnar epithelium
Where is transitional epithelium found in the body?
Lining of the proximal portion of the urethra Lining of the ureters Lining of the urinary bladder
Where is simple columnar epithelium found in the body?
Lining the stomach Lining the uterine (fallopian) tubes Lining the small and large intestine
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 cilia?
Movement of something across the cell's surface
What are the visible characteristics of transitional epithelium?
Multiple layers of cells Rounded apical surfaces that resemble a tombstone shape Neighbors a hollow cavity called the lumen
A tissue on your lab exam has an apical surface and basement membrane. You observe multiple layers. The cells near the apical surface are flattened cells while those near the basement membrane are cuboidal or columnar in appearance. You identify it as transitional epithelium but later learn it was actually stratified squamous epithelial tissue. What key feature in the description of this tissue makes your answer incorrect?
Presence of flattened cells near the apical surface
Identify the primary functions of simple cuboidal epithelium.
Secretion and absorption
Identify the primary functions of simple columnar epithelium.
Secretion and protection
Which of these are visible characteristics of stratified squamous epithelium?
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. The squamous cells closer to the lumen are flatter while the squamous cells closer to the connective tissue are fuller and rounder.
Describe the apical surface.
The apical surface is sometimes covered with cilia The apical surface is closest to or on the luminal surface Secretions from goblet cells are released from the apical surface of a cell
What type of tissue has cells that are tightly packed, sits on a basement membrane, is avascular, and is easily regenerated?
epithelium
What tissue is specialized for the rapid diffusion of gases and nutrients across its cells?
simple squamous epithelium
Which type of tissue is situated in the lining of the urinary bladder and urethra where stretching occurs?
transitional epithelium
Which of the following best describes pseudostratified epithelium?
Single layer of cells with various heights
Glands, such as the thyroid, that secrete their products so that they directly diffuse into the blood rather than through ducts are classified as ________.
endocrine
The specific type of epithelial tissue found lining organs of the digestive system such as the small intestine is ________.
simple columnar
People with asthma produce too much mucus, which can block the airways. What type of cell associated with the epithelium of the respiratory tract is responsible for making mucus?
Goblet cell
What are the visible characteristics of ciliated pseudostratified columnar epithelium?
Cilia project from the apical surface into the lumen. Goblet cells are columnar cells that can be seen interspersed within the tissue. The nuclei are found in multiple planes, giving the illusion of multiple cell layers
Identify the one characteristic that does NOT describe a goblet cell.
Component of a mucous gland