The laptop doesn't tell the printer to print. The laptop tells the router to print, then the router tells the printer to print. You will need to plug a computer up to the printer initially to set it up. Once the printer has been initialized and added to your network, you can unplug the computer and use the printer.
The alveolar epithelium comprises two main cell types: the alveolar type I and alveolar type II cell. The type I cell is a complex branched cell with multiple cytoplasmic plates that are greatly attenuated and relatively devoid of organelles; these plates represent the gas exchange surface in the alveolus.
If the lining of the stomach is examined with a hand lens, one can see that it is covered with numerous small holes. These are the openings of gastric pits which extend into the mucosa as straight and branched tubules, forming gastric glands. Types of Secretory Epithelial Cells.1  Mucous cells: secrete an alkaline mucus that protects the epithelium against shear stress and acid. 2  Parietal cells: secrete hydrochloric acid! 3  Chief cells: secrete pepsin, a proteolytic enzyme. 4  G cells: secrete the hormone gastrin.here are differences in the distribution of these cell types among regions of the stomach-for example, parietal cells are abundant in the glands of the body, but virtually absent in pyloric glands.