Question

The part of an epithelial cell membrane that faces the lumen of a body cavity is the ________ membrane, while the side facing the bloodstream is the ________ membrane.

Answer 1

Answer:

The part of an epithelial cell membrane that faces the lumen of a body cavity is the apical membrane, while the side facing the bloodstream is the basolateral membrane.

Explanation:

The epithelium, or epithelial tissue, is a group of cells that form sheets and create a membrane. Epithelial cells have both morphological, biochemical and functional domains, which give the cell a polarity, these cells have two different membrane domains to communicate with each of these means: apical and basolateral. The apical membrane is the cellular region that comes into contact with light (lumen of a body cavity), this region is characterized by being rich in ion channels, transport proteins, glycoproteins, hydrolytic enzymes, among others, the apical domain is located in a more distal position with respect to the Basal lamina, or rather is that which is in contact with the free surface of the epithelium, the other domain is the basolateral domain whose region is the lateral side of the cell and the basal region. The basolateral domain can be classified into two regions the lateral plasma membrane and the basal cell membrane. In the basolateral membranes are the necessary transporters to remove from the enterocyte the molecules that have to pass into the bloodstream.