Describe the processes that cause these chemical substances to move into and out of cells.?
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It would depend on several factors. Small, uncharged molecules can pass through the cell membrane through diffusion. When it is water, it is called osmosis. Diffusion can only occur into the cell when the concentration of the substance is greater outside the cell than within it, and likewise only out of the cell when the concetration is greater inside the cell than outside. This is called the concentration gradient.\n\nWhen the molecule is charged or is large (such as a chlorine ion or a lactose molecule), it requires active transport by carrier proteins. There are also carrier proteins that help to transport against the concentration gradient.\n\n[Edit] \nAfter thinking for a bit, I believe it would be pertinent to include something about the more complex methods of active transport.\n\nThere are two "directions" of the complex forms of active transport: in (endocytosis) and out (exocytosis).\n\nExocytosis is when a vesicle, after being released from the Golgi complex, fuses to the cell membrane, releasing the contents.\n\nEndocytosis is done by three main means: Phagocytosis, Pinocytosis, and Receptor-Mediated Endocytosis.\n\nPhagocytosis is the process of enveloping a large particle, such as how many unicellular organisms "eat" other organisms. The large particle comes in contact with the cell membrane, stimulating the formation of a vesicle. This vesicle then enters the cell and depending on the contents may fuse with a lysosome to help to digest it.\n\nPinocytosis also forms a vesicle, but differs from phagocytosis because it forms a much smaller vesicle.\n\nReceptor-mediated endocytosis is when particles that cannot normally enter the cell bond to receptor proteins embedded in the cell membrane. These proteins then congregate and form a vesicle. \n\nIn all forms of endocytosis and exocytosis, ATP is required for energy.
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Grab your textbook or go to wikipedia.\n\nSee:\n\n1. Random Molecular Motion\n2. Diffusion\n\nThe simple answer is that atoms and molecules move constantly because they have energy, the amount of energy something has can be measured, in your example through heat. The less energy something has, the slower it will move and conversely the more energy something has the faster it will move. This is random molecular motion.\n\nDiffusion is the motion of these molecules from areas of abundance to areas scarcity. Molecules will diffuse until they are evenly distributed throughout a solution. Too illustrate this try to think of the molecules as marbles in a box, in the beginning they are all bunched up in one corner, but if you start to shake the box they will begin to bump against one another, at first rapidly because they are all bunched up. As time goes on they will spread out until they fill the entire box and are bumping up against each other at a rate that keeps them as evenly spread out as the box allows. The amount of energy you apply to the shaking will cause them to move faster or slower, or in your example, cold water will make the food coloring distribute slower and hot water will make them distribute faster.
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Do you mean the molecular composition or macroscopic composition? There would be too much to post here so I suggest you visit the following\n\nhttp://users.rcn.com/jkimball.ma.ultranet/BiologyPages/B/Blood.html#formation
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1) facilitated diffusion (passive process involving a transport carrier)\n\n2) most of the dissolved substances are inside the egg so water would flow in to try and equilibrate (expands, lyse)\n\n3) in corn syrup the substances are on the outside so the water would flow out (shrinks)
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Absorbed from the ground into the roots of the tree-transported up the tree by capillary action all the way to the leaf- Absorbed into one of the cells on the surface of the leaf, where is travels to the surface of the leaf and evaporates, turning into a gas.  Moves about the atmosphere until it gathers with many other water gas molecules in a cloud-then at some point coalesces with other water molecules forming a liquid again, which falls to the ground.
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fluids - convection is due to the movement of molecules
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the molecules the cell incorporates must be chemically modified to obtain Energy from them. In the first place a reaction occurs in the cytoplasm and then (for those organisms that perform respiration) inside the mitochondria some other reactions occur. The last ones are called respiration.
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the cell dividing force lol. theres no such force. it's a spontaneous occurence
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Diffusion is transfer of ions or any semipermeable substance through semipermeabe membrane,with help of concentration Gradient across the membrane. Osmosis is loss of water and vapours frm tissue or organised structure like stomata
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a chemical called endorphin that is released into your body via your cells
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some cells to take in more. Cell permiablility.\n\nhttp://www.answers.com/topic/cell-permeability
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useful substances enter and waste products exit of course.\nuseful substances include glucose, oxygen, amino acids, etc.\nwaste products would be carbon dioxide, urea, etc.
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this Vacule incapsulates the waste and moves it to the cell membrane and then pushes it out of the cell pores in the cell membrane.
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Diffusion is the spontaneous spreading of something such as particles, heat, or momentum. The phenomenon is readily observed when a drop of colored water is added to clear water, or when smoke from a chimney dissipates into the air. In these cases, diffusion is the result of turbulent fluid motion rather than chemical reactions or the application of external force. In cell biology, diffusion is described as a form of "passive transport", by which substances cross membranes. \n\nOsmosis is the diffusion of a solvent through a semipermeable membrane from a region of low solute concentration to a region of high solute concentration. The semipermeable membrane is permeable to the solvent, but not to the solute, resulting in a chemical potential difference across the membrane which drives the diffusion.
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ATP expelling water.  Glucose is broken down to make ATP and the process consumes oxygen, while expelling water. :)
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A special type of diffussion called osmosis.\n\nOsmosis is the net movement of only WATER molecules from a region of their higher concentration to a region of their lower concetration though a partially/selectively permeable membrane.  (cell membrane)
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Very interesting question. Ion channels are small pores in a cell membrane (the membrane is like the skin on an apple). The channels let ions (atoms or molecules which have an electric charge) travel into and out of the cell. This is how chemical nutrients get into the cell!