Why are most epithelial tissues only a few cells thick?Multiple choice question.One of the surfaces of epithelial cells is always in contact with the external environment and is constantly damaged.Epithelial cells can only undergo a few mitotic divisions before they die.The diffusion of nutrients, wastes and gases through the basement membrane is limited.

Why are cells of simple epithelia squamous, cuboidal or columnar? To allow for different thicknesses of the basement membranes Because of different amounts of other cell types in the epithelial cell layer To give different extents of protection to the underlying tissues To allow for different amounts of active processing in epithelial function To control the internal diameter of tubes by lining with different cell heights

Which is true of simple squamous epithelium?Multiple choice question.cells are spaced widely apart with lots of extracellular materialit is a thick tissue, ideal for absorption and secretionthe design of the tissue makes it ideal for substances to diffuse through it

Which type of epithelium is one cell layer thick?

Select all that applyWhat are some features of epithelial tissues?Multiple select question.Presence of adhesive structures (for example, tight junctions)Cells rarely, if ever, divide after an organism reaches adulthoodDiffusion of nutrients and gases enhanced by gap junctionsLittle or no extracellular materialCells organized into multiple (tens or hundreds) layers

Epithelial tissues are organized as one or more of densely packed epithelial cells.