Bio 152 Tissues-Questions with Correct Answers
Define Tissues
A group of specialized cells that perform specific functions
List the 4 basic tissue types
Eptihelial
Connective
Muscular
Neural
Define epithelium
One or more layers of closesly associated cells forms coverings and lining
Functions of epithelial tissues
Protection
Controld permeability
Absorbption
Secretion (forms glands)
Provides sensation (houses sensory receptors)
Types of junctions between epithelial cells
, Tights Junctions(fused membrane proteins)
Desmosomes(linked cell adhesion molecules with stabilizing filaments)
Gap Junctions(forms gaps that allow diffusion of small molecules between cells)
Describe epithelium
Cells have polarity (apical diff from basal surface)
Basal surface sits on basement membrane composed of basal lamina on top of a collagen fiber
layer
Cells attached to basement membrane by hemidesmosomes
Apical surfaces may have apical specialization
Lacks blood vessels
Regenerates through mitosis
Classifications of epithelial cell
Simple: single layer
stratified: many layers
pseudostratified: looks stratified but all cells attach to basement membrane
Squamos:Flat pancake-like
Cuboidal: cube shaped
Columnar: column shaped
Function and Location of Simple squamous
Define Tissues
A group of specialized cells that perform specific functions
List the 4 basic tissue types
Eptihelial
Connective
Muscular
Neural
Define epithelium
One or more layers of closesly associated cells forms coverings and lining
Functions of epithelial tissues
Protection
Controld permeability
Absorbption
Secretion (forms glands)
Provides sensation (houses sensory receptors)
Types of junctions between epithelial cells
, Tights Junctions(fused membrane proteins)
Desmosomes(linked cell adhesion molecules with stabilizing filaments)
Gap Junctions(forms gaps that allow diffusion of small molecules between cells)
Describe epithelium
Cells have polarity (apical diff from basal surface)
Basal surface sits on basement membrane composed of basal lamina on top of a collagen fiber
layer
Cells attached to basement membrane by hemidesmosomes
Apical surfaces may have apical specialization
Lacks blood vessels
Regenerates through mitosis
Classifications of epithelial cell
Simple: single layer
stratified: many layers
pseudostratified: looks stratified but all cells attach to basement membrane
Squamos:Flat pancake-like
Cuboidal: cube shaped
Columnar: column shaped
Function and Location of Simple squamous
