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Tissue Levels (Ch 4) Test

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1.
formed by the fusion of the outer layers of the cell membranes; it prevents the passage of water and solute between cells
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2.
two cells are held toghether by embedded membrane proteins, they are channel proteins that form a narrow passageway that lets small molecules and ions pass from cell to cell
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3.
What are exocrine secretions?
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4.
What are endocrine excretions?
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5.
Where are epithelia found?
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6.
What are the functions of epithelia? (PSP'S)
A.
tight junctions
B.
1. Provides physical protection 2.conrols permeability 3.Provide sensation 4.produce Specialized Secretions
C.
They secretions dischargedonto the surfacde of epithelium. Examples:Milk of mammary glands, perspiration on the skin, enzymes entering digestive tract
D.
They are secrteions released into surrounding tissues and blood. These secretions are hormones that producesd in specific organs
E.
gap junctions
F.
It covers the skin,it linea internal passageway that communicate with the outside such as the digestive, repiratory, reproductive, and urinary, tracts
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7.
It is composed of secreting cells derived from epithelia
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8.
cell membranes of two cellls are locked together by intercellular cement and by membrane proteins
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9.
small, fingerlike extensions of the exposed cell of an epithelial cell
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10.
a collection of cells
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11.
The matrix of cartilage consists of a firm gel and cells called
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12.
the study of tissues
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13.
this includes epithelia and glands
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14.
are layers of cells that cover internal or external surfaces

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