Bio CK12 2.11 Diffusion

2. is the diffusion of solutes through transport proteins in the cell membrane
5. movement of substances across a plasma membrane that does not require energy because the substance is moving from a higher to lower concentration.
6. simple sugar that all living things use to store and transport energy.
8. watery substance that makes up cytoplasm, and contains other cell structures such as ribosomes.
13. membrane-spanning protein that allows transport of a specific ion through the cell membrane.
14. the difference in the concentrations of molecules across a membrane.
15. simple sugar that all living things use to store and transport energy.
16. water-fearing.
17. The end result of diffusion is an equal concentration, or
18. the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration
20. something that triggers a behavior or causes a reaction in an organism.
21. transport protein that spans (crosses) a cell membrane; carries an ion or molecule across the membrane by changing shape.

1. protein in a cell membrane that helps molecules pass through the membrane, by either forming a channel for the molecules or carrying the molecules through the membrane.
3. movement of substances across a plasma membrane that requires energy because the substance is moving against the concentration gradient, from a lower to higher concentration.
4. channel protein that can be opened or closed; reacts to specific stimuli.
7. transport protein that spans (crosses) a cell membrane; forms an open channel or passageway (pore); allows water molecules or small ions to diffuse through the membrane.
9. one of many cable-like bundles of axons that make up the peripheral nervous system.
10. the ability to do work.
11. electrical signal transmitted by the nervous system.
12. element that is a component of bone and teeth.
16. water-fearing.
19. cell that transmits electrical impulses in the nervous system; commonly called a nerve cell.