Cells are the smallest ____ of life. They are a ____ system, can ____, and are the ____ of our bodies. A cell consists of three major regions, the ____, the ____ and the ____. The ____ surrounds the cell to create a barrier between the ____ and the ____ The structure resembles a ____ made up of ____, cholesterol, and ____. the structural components of the membrane, form both ____ and ____ layers; part of the structure has a high affinity for water and the other part is repelled by water. The inner surface of each layer is made up of ____ and thus is hydrophobic. The outer surface of each layer is made up of the ____ of the phospholipids and is hydrophilic. Proteins associated with the plasma membrane are either ____ membrane proteins or ____ membrane proteins. Peripheral membrane proteins interact as ____ while integral membrane proteins allow molecules to ____. The outer plasma membrane of the rough endoplasmic reticulum (rER) is carpeted with ribosomes, causing it to appear dotted under a microscope. ____ production occurs in the ribosomes of rER. The smooth endoplasmic reticulum, abbreviated sER, lacks ____ and thus appears smooth under a microscope. Primarily responsible for the production of ____. The ____ appears as a series of flattened, membranous sacs, or cisternae, just off the rough endoplasmic reticulum. It receives vesicles containing proteins recently produced by the endoplasmic reticulum. it can be compared to a warehouse or post office for newly formed proteins. Here the proteins are further ____, ____, and sent off to their final destinations outside the cell.

cellular structures

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