The plasma membrane is best described as?

Answer 1

The plasma membrane forms the outer border of the cell, separating it from bordering cells and/or the external environment. it is composed primarily of a bi-lipid layer in addition to various proteins and cytoskeletal components. It performs multiple tasks, and contains many receptors and cell-to-cell channels whereby cells can communicate and interact with each other. There are several methods of describing cell movement, but in a single cell (classically in a white blood cell) chemotaxis is the method where the cells sense and respond to a specific stimulus by migrating toward it along a chemical gradient. This type of movement could be described as amoeboid if the cell forms pseudopods (legs), flagellate if they have a tail (flagellum) or migratory if the cell is present within a blood vessel where it attaches to specific receptors on the inside of the blood vessel, begins to roll, then attaches and leaves the vessel through small channels (again, typical of chemotaxis).