Facilitated diffusion
The part of a foreign substance that is insertde into a macrophage membrane?
A concentration gradient of a substance drives the movement of that substance from an area of high concentration to an area of low concentration. The steeper the concentration gradient, the faster the movement of the substance, requiring less energy to transport it. If the concentration on both sides of the gradient is equal, there is no net movement of the substance.
selectively permeable
The semifluid substance that fills a cell is cytoplasm.
osmotically active
it goes in straight lines
Osmosis and diffusion.
Facilitated diffusion
The diffusion of substances across a membrane is called passive transport. Molecules move from where the substance is more concentrated to where it is less concentrated.
away from the area where it is more concentrated
from an area of low concentration to an area of high concentration (if it is water) the opposite if it is a solid
Osmosis
The part of a foreign substance that is insertde into a macrophage membrane?
A concentration gradient of a substance drives the movement of that substance from an area of high concentration to an area of low concentration. The steeper the concentration gradient, the faster the movement of the substance, requiring less energy to transport it. If the concentration on both sides of the gradient is equal, there is no net movement of the substance.
Proteinscell membrane
selectively permeable
selectively permeable