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Anatomy & Physiology I
A & P definitions and note summaries
10
Anatomy
Undergraduate 2
08/19/2010

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Term
Tissue
Definition
A group of cells with similar appearance that work together to carry out specialized functions
Term
Organ
Definition
A structure containing two or more combined tissues to form a single functioning unit
Term
Epithelial Tissue
Definition
Tissue found on surfaces and in glands
ex:
Term
Connective Tissue
Definition
Tissue which connects, binds, and supports.
ex:
Term
Muscular Tissue
Definition
Tissue specialized in muscle contraction and body movement.
ex:
Term
Nervous Tissue
Definition
Tissue that specializes in detecting bodily changes, responses, and rapid communication.
ex:
Term
Intracellular Junctions
Definition
Contact points between the plasma membranes of neighboring tissue cells.
5 Types: Tight Junction, Adherens Junction, Desmosomes, Hemidesmosomes, and Gap Junctions.
Term
Tight Junction
Definition
Composed of trans-membrane proteins that fuse to create tight seals between adjacent cells.

Prevents leakage of contents into the intracellular spaces between cells

ex: stomach, intestines, urinary bladder
Term
Adherens Junction
Definition
Contains dense layer of proteins(aka plaques) that form adhesion belts around the cell

Cadherin: transmembrane glycoproteins which extend from plaque into the intercellular space

Provides strong attachment points which resist separation
ex: intestines
Term
Desmosome
Definition
Provide stability and strength (strongest)

Contain plaques and cadherin proteins

Intermediate filaments that extend from the plaque into the cytoplasm
Ex: found in skin & cardiac muscle(Heart)
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