That is the description of simple diffusion.
it moves materials from areas of high concentration to areas of low concentrationit moves materials of high concentration to areas of low concentration
transport of materials through cell wall without energy.
the movement of one of the transported substances down its concentration gradient
For passive diffusion, a concentration gradient which uses pore proteins. For active diffusion, carrier proteins and energy are required.
Yes, but only with an expenditure of energy which characterizes active transport.
passive transport
Passive transport is the movement of substances across a cell membrane without the use of energy. It occurs along a concentration gradient, with substances moving from an area of high concentration to an area of low concentration. Examples include diffusion and facilitated diffusion.
Diffusion is the movement of molecules from a high concentration to a low concentration without using ATP (energy). A related term: Osmosis is the movement of water molecules from a high concentration to a low concentration without using ATP (energy). In contrast, active transport is the movement of molecules from a low concentration to a high concentration but DOES use ATP (energy).
Active transport uses energy to move substances against the concentration gradient.
no down a concentration gradient high to low if its low to high it requires energy
it moves materials from areas of high concentration to areas of low concentrationit moves materials of high concentration to areas of low concentration
transport of materials through cell wall without energy.
No. Diffusion is a natural occurrence of the net movement of substances from a region of higher concentration to a region of lower concentration (down the concentration gradient).
Passive transport is when substances move past the membrane without using any energy.
the movement of one of the transported substances down its concentration gradient
For passive diffusion, a concentration gradient which uses pore proteins. For active diffusion, carrier proteins and energy are required.
Your mom...........no I'm just kidding, but there are some cars that regire no energy, but just solar power.