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59 Cards in this Set

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Lines the internal lumens and covers the external surfaces of organs.
Epithelium
Epithelium is separated from the underlying connective tissue by what?
basement membrane
Epithelium is primarily ________? And receives nourishment by _______?
Epithelium is primarily avascular. It receives nourishment by diffusion from underlying blood vessels.
What are the functions of Epithelium?
Diffusion
Transport
Absorption
Secretion
What is the difference between basal lamina and basement membrane?
Basal lamina PLUS the connective tissue component under it = the basement membrane.
A layer of _______ underlies the basement membrane.
Reticular fibers
What are the functions of the basement membrane?
1. Adheres epithelial cells.
2. Filtration (can be leaky/ not)
3.Tissue compartmentalization (provides a border)
4. Helps "right" cells (Dictates up/down polarity)
Bowman's capsule in kidney = ?
Simple Squamous
Lining of respiratory spaces in lungs = ?
Simple Squamous
What are the two types of simple sqamous epithelium?
Endothelium
Mesothelium
Lining of vascular system (blood/lymph) = ? (specifically)
Simple Squamous Endothelium
Lining of body cavities = ? Specifically
Simple Squamous Mesothelium
Think Renal! = ?
Simple Cuboidal
Small ducts of exocrine glands = ?
Simple Cuboidal
Kidney tubules = ?
Simple Cuboidal
Think digestive system! = ?
Simple Columnar
Small intestine and colon lining = ?
Simple Columnar
Gallbladder lining =
Simple Columnar
Stomach lining and gastric glands =
Simple Columnar
Trachea and bronchi lining =
Pseudostratified Ciliated Columnar
Lining of ductus deferens
Pseudostratified Ciliated Columnar
Efferent ducts of epididymis
Pseudostratified Ciliated Columnar
In stratified cuboidal epithelium, where do you look to figure out the shape of the cells?
The top layer.
Sweat gland ducts and large ducts of exocrine glands =
Stratified cuboidal
Largest exocrine gland ducts (salivary) =
Stratified Columnar
Epidermis
Keratinized Stratified Squamous
Lining of oral cavity and esophagus
Stratifies Squamous
Lining of vagina and lower anal canal
Stratified Squamous
What type of epithelium can be keratinized?
Stratified Squamous
What type of epithelium changes shape based on pressure?
Transitional
What landmark can you use to recognize transitional epithelium?
Look for scalloped cells that pop out on top as landmarks.
Renal calyx
Transitional
Bladder, Ureter, and Urethra near internal urethral sphincter
Transitional
Glands are usually what kind of epithelium?
Simple Cuboidal
These originate from an epithelium that penetrates the connective tissue and forms secretory units.
Glands
Secrete products onto surface via ducts.
Exocrine glands
No ducts. Secrete into CT spaces where they are absorbed into bloodstream by capillaries.
Endocrine glands
This type of gland secretes hormones.
Endocrine gland
What are the two types of glands?
Unicellular
Multicellular
Composed of a single cell with no duct.
Unicellular gland
What is a common example of a unicellular gland and where would you find it?
goblet cells
tracheal epithelium
What are the 3 type of gland secretions?
Mucus, Serous, Mixed
How does mucus stain? What types of glands secrete mucus?
Foamy, clear and bubbly- lacking stain.
Goblet cells, sublingual cells
How do serous secretions stain? Whats in them? What is an example?
Eosinophilic.
Watery secretions rich in enzymes.
Parotid gland.
Only ________ glands can have mixed secretions.
Multicellular.
Submandibular glands have what type of secretion?
Mixed secretion
Merocrine
cells release their contents by exocytosis
Holocrine
entire secretory cell and contents released
Metaplasia
The transformation of one cell type to another.
When does metaplasia usually occur? Why?
Reversible and usually occurs in response to chronic irritation and inflmmation.
Allows for substitution of cells that are better able to survive.
Dysplasia
An abnormality in the appearance of cells.
What does dysplasia indicate?
Indicative of early step towards transformation into neoplasia.
Neoplasia
uncontrolled, progressive growth
Bening Neoplasm
Remains localized
Malignant Neoplasm
Grows into adjacent tissues and spreads to distant locations
Polyps
Benign Epithelial Neoplasm
Arises from surface epithelia
Adenomas
Benign Epithelial Neoplasm
arise from glandular tissue
Carcinomas
Malignant Epithelial Neoplasm
Arise from surface epithelia
Adenocarcinomas
Malignant Epithelial Neoplasm
Arise from glandular tissue