Picture added 2. Simple cuboidal epithelium (illustrated in Figure 3.3, which is
ID: 184245 • Letter: P
Question
Picture added
2. Simple cuboidal epithelium (illustrated in Figure 3.3, which is comparable to the example represented in the slide you have)
a. This type of epithelium lines many ducts. Why might “simple cuboidal” (as opposed to some alternative) be a good choice for an epithelium in this location?
b. Is the simple cuboidal epithelium in the slide you are using associated with a duct? What is the basis for your “yes” or “no” answer?
c. Given the location of the epithelium (e.g. lining a duct), what sorts of associations (i.e. junctions) would you expect to find between the cells? Explain the significance of these associations.
1. basement membrane. Even though every epithelium is associated with a basement membrane, the staining system used in the preparation of this slide provides a particularly good demonstration of the basement membrane. Using geographical terms commonly applied to epithelia, describe the location of the basement membrane.
2. What is the general nature of the basement membrane? What is the source of materials that make up the basement membrane?
3. Why does it seem reasonable that an epithelium should be associated with a basement membrane?
CuboidalExplanation / Answer
1. The basemwnt membrane is found between the epithelium and the underlying connective tissue .
2. The basement membrane is made up of type 4 collagen, laminin,heparan supfate proteoglycans.
3. As the epithelial lining does not have blood supply so the small molecules gasesous exchange occurs through it. The basement membrane helps in all the metabolic needs of epithelium and it also protects it from invading into the connective tissue.