A process that incorporates voluntary movement into an organism can be correctly described as somatic. Somatic education tends to organize outwardly-directed, voluntary processes on the scale of the whole organism. Most voluntary movements of an organism are directed toward producing changes in its local environment.
Molecules don't voluntarily move, so they can't be educated! Molecules swim aimlessly in a process called diffusion. All one can say about molecular swimming, in general, is that the warmer the water, the faster the swimming. Since everywhere has a temperature, all molecules swim.
Most individual cells also lack the capacity for voluntary movement, especially in the context of a human. Instead, most cells fish for a living. The first part of this article introduced the fishing metaphor and contrasted it with a much-less-apt metaphor, breathing. In the fishing analogy, the principal activity of cells is to wait for a molecule to swim into proximity, where it can then be hooked or netted. Whether that small molecule is food or oxygen, a signalling molecule like a hormone, or something artificial like a drug, the primary vocation of all cells in all organisms is to fish.
There are a handful of ways that cells fish, but there are only two basic tricks for getting across the cell membrane and 'on-board' the cell. The first trick involves the invagination and pinching-off of the cell membrane so that a small bubble of the membrane is formed inside the cell. There are a few terms for this based on the specifics of the process, like pinocytosis and phagocytosis, that I won't elaborate on here. The crude picture here is fishing by lowering a bucket into the water and then drawing it aboard with whatever happened to swim into it.1
The second fishing trick directly involves proteins that are incorporated into the cell membrane. These proteins have specific structures that recognize the target molecules and bring them into the cell. Sometimes these proteins look like pores and are called porins or channels. Sometimes they use much-more elaborate processes that entail binding the target molecule, changing shape in response to the binding event, and allowing the molecule to be released on the other side of the membrane. Such elaborate proteins are often called transporters.
This second type of fishing trick is something that human-sized fishers aren't so good at. When trying to catch a particular type of fish, one can use knowledge of that species' behavior to fish in the right places at the right times. More analogous to a cell's use of membrane proteins, a fisherman can use bait and lures that are most attractive to a particular target. However, in general, human fishers obtain a lot of by-catch, unintended acquisitions because of the lack-of-specifity of the fishing process.
Cells deal with by-catch too, especially when using the first approach of invagination-and-pinching-off. Often, the two approaches are combined into a hybrid strategy we'll explore more here. This is the cellular fishing strategy named receptor-mediated endocytosis. Here, a membrane protein (the receptor) affords for binding of specific molecules, and then a subsequent invagination and pinching-off of the cell membrane forms an intracellular bubble, named an endosome in this context.
In receptor-mediated endocytosis, the outside-the-cell-facing receptors hook onto the fish-molecule, and the resulting endosome contains both the receptors and their fish-molecules on its inside. This is convenient for the cell because it can move the endosome to specific locations for processing.
For example, let's say the cell requires more cholesterol (an essential component of cell membranes, among many other things) and it's a typical cell that doesn't make its own cholesterol (liver cells specialize in synthesizing cholesterol). Cholesterol doesn't circulate in the blood as a free molecule, but is packaged into larger, protein-containing 'fish' called Low Density Lipoproteins (LDLs). The cell is coated in patches of LDL receptors, which are membrane proteins that specifically bind to LDL and change their shapes.2 On the interior of the cell, other proteins detect the changed shape and initiate an invagination process that brings the LDL-bound receptors into an endosome. The endosome is then acidified, causing the receptors to release the LDL molecules, and the receptors are then gathered and returned to the cell membrane. The endosome's contents are then further digested into amino acids (from protein-containing by-catch) and lipids (including the cholesterol molecules).
The cell has multiple strategies for wrangling intracellular cholesterol, including moving it in other membrane bubbles. In some fishing contexts the fish would be kept alive in a small tank (membrane bubble). In other contexts, it would be buried in ice (binding to a cholesterol-transporting protein) or immediately processed into canned fish (metabolized into other molecules). There are many ways to skin a fish!
The beauty of cell membranes is that, in this analogy, the bucket would be made of the same material as the boat's hull, and spontaneously assembled from the hull!
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2740366/