Chapter 4: The Tissue Level of Organization

What are the primary tissue classes?

• Epithelial

• Connective

• Muscle

• Neural

• All of the above

Which of the following is not a function of epithelia?

• Provide Physical Protection

• Control Permeability

• Establish a structural framework for the body

• Produce specialized secretions

Which of the following is not a defining characteristic of epithelia?

• Cellularity (cell junctions)

• Polarity (apical and basal surfaces)

• Avascularity

• Attachment (basement membrane or basal lamina)

• All of the above are characteristics of epithelia

Which specialized structures are only found in epithelia?

• Microvilli (to increase surface area)

• Sterocilia

• Cilia (to move particles across surface)

• Flagella

Which of the following is not a layer when classifying epithelial cells?

• Simple

• Columnar

• Stratified

• Pseudostratified

Which of the following is not a shape when when classifying cells?

• Squamous

• Cuboidal

• Triangular

• Columnar

Which of the following is not a specialization of epithelial cells?

• Transport blood

• Move fluids over the epithelium

• Move fluids through the epithelium

• Produce secretions

Which of the following is not a cell junction?

• Tight

• Desmosomes

• All are cell junctions

• Gap

What defines a tight junction?

• Made up of CAMs and proteoglycans (glycocalyx)

• Form a channel by joining membrane & channel proteins from adjacent cells

• Allows the least amount of passage.

• None of the above.

What defines a desmosome?

• Made up of CAMs and proteoglycans (glycocalyx)

• Allows the least amount of passage

• Form a channel by joining membrane and channel proteins

• None of the above