Term
| Functions of Epithelial Tissue |
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Definition
P.A.S.S.
Physical protection
Absorption
Sensations
Secretions |
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Term
| How does epithelial tissue act as a barrier/protect? |
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Definition
Protects internal and external surface from mechanical and chemical injury
also protects against dehydration
Acts as a selective barrier between the environment and internal structures |
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Term
| Name an example of where epithelial tissue will serve as a protective barrier |
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Definition
| lining of the respiratory system |
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Term
| how does absorption serve as a function of Epithelial Tissue and give an example of where it can be found |
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Definition
By regulating the passage of substances into the body
found: small intestine |
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Term
| Sensory receptors are derived from epithelial tissue, true or false? |
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Definition
| True: Many specialized sensory receptors (i.e. rods and cones of retina, taste buds, etc.) are derived from epithelial tissue |
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Term
| Modified epithelial tissues group together to form what two types of glands (HINT: these glands secrete things) |
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Definition
| Exocrine and Endocrine Glands |
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Term
| Define: Exocrine Gland and give an example |
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Definition
Glands with ducts or tubes to transport or secrete
Example: Salivary glands |
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Term
| Define: Endocrine gland and give an example |
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Definition
Glands that are ductless/tubeless, whereby chemicals (i.e. hormones) are transported by being released into the environment and carried throughout the body via circulatory system
Example: Thyroid Gland |
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Term
| Define: Basement Membrane |
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Definition
| A thin extracellular layer that physically separates the epithelial tissue from the underlying connective tissue |
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Term
| What are the functions of the basement membrane |
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Definition
Act as regulator for movement of molecules into deeper connective tissue
Anchor the epithelium to the underlying connective tissue (main job) |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Tall, Narrow and column shaped |
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Term
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Definition
| layer that is only 1 cell thick |
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Term
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Definition
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Term
| Function: Simple Squamous Epithelium |
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Definition
| Specialized to allow movement of molecules across the cell |
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Term
| Where can a Simple Squamous Epithelial structure be found? |
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Definition
Endothelium (Inner lining of blood vessels)
lining of alveoli
Mesothelium (Lining of abdominal cavity) |
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Term
| Function: Simple Cuboid Epithelium |
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Definition
| absorb fluids across it's surface (both ways) |
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Term
| where can a simple cuboid epithelial structure be found |
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Definition
| lining of nephron in kidney (tubular components) |
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Term
| What are the two types of simple columnar epithelium |
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Definition
| cilliated and non cilliated |
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Term
| non-cilliated simple columnar epithelium has micro villi on its surface, true or false? Why? |
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Definition
| True, to increase surface area for better absorption and secretion |
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Term
| What are Goblet cell and where can they be found? |
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Definition
| Goblet cells: cells that produce mucin. They can be found in simple columnar structures, between the columnar cells |
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Term
| Where can non-cilliated simple columnar epithelium be found? |
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Definition
| Digestive system (i.e. small intestine) |
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Term
| What is the function of a stratified squamous epithelial structure and where can it be found |
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Definition
| protection, found in epidermis of skin |
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Term
| What is the function of a stratified cuboidal epithelial structure and where can it be found |
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Definition
Protection; found in lining of sweat ducts and salivary gland ducts
NOTE: both exocrine glands |
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Term
| What is the function of a stratified squamous columnar structure and where can it be found |
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Definition
| Protection; found in parts of the male urethra and conjuctiva of the eye |
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Term
| put the structures in order from most prevelantly found in the body, to least; Stratified columnar, stratified squamous and stratified cuboidal |
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Definition
| squamous > cuboidal > columnar |
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Term
| Define: Psudostriated columnar |
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Definition
cells appear to be striated but are actually simple since all cells make contact with the basement membrane
NOTE: cilliated with goblet cells can be found in respiratory system |
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Term
| Define: Transitional epithelium |
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Definition
| stratified layers of cells that can transition between shapes (i.e. in bladder; when full they're squamous and when empty their cuboidal) |
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Term
| Skin is considered squamous even though deeper layers are cuboidal, why? |
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Definition
| Because the top layer is squamous |
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