Tissues and Junctions

What is the function of the intercellular junctions?

• Hold cells together

• Generating action potentials

• Resist mechanical stress

• Intercellular communication

• Aids in cell identification

Fusion of plasma membranes to prevent molecules from passing between cells.

• Desmosomes

• Gap Junctions

• Snap Junctions

• Tight Junctions

Resist mechanical stress and hold cells together by "hooking" the cytoskeleton and proteins together.

• Tight Junctions

• Desmsomes

• Gap Junctions

• Zipper Junction

Allow for rapid electrical communication and nutrient distribution through a pore of proteins connecting the cytoplasm of cells together.

• Desmosomes

• Gap Junctions

• Tight Junctions

• Snap Junctions

Which tissue serves as the boundary between body compartments or between the body and the outside environment?

• Muscle Tissue

• Connective Tissue

• Epithelial Tissue

• Adipose Tissue

Which of the following are features of epithelial tissue?

• Line all body's surfaces

• Contains tightly packed cells

• Provides structural support

• Creates body heat

• Avascular

Epithelial cells are classified by:

• The number of cells

• The number of cell layers

• The shape of the cells

• The location of the cells

• The function of the cells

This tissue is found in the alveoli of the lungs and the capillaries.

• Simple cuboidal epithelium

• Simple columnar epithelium

• Simple squamous epithelium

• Stratified squamous epithelium

This tissue is found in the sweat glands, thyroid gland, and kidney tubules.

• Simple cuboidal epithelium

• Simple columnar epithelium

• Pseudostratified columnar epithelium

• Squamous cuboidal epithelium

Allows for rapid diffusion.

• Simple squamous epithelium

• Simple cuboidal epithelium

• Simple columnar epithelium

• Stratified squamous epithelium