What is required for diffusion to occur quizlet?
in order to diffuse, the passage across the membrane must be enabled or helped. moves solute from areas of low concentration to high concentration (against gradient). opposite of diffusion; requires transport protein and energy (ATP). non-polar molecules can cross the cell membrane more easily than polar molecules.
What is absolutely necessary for diffusion?
Of the following conditions, which is absolutely necessary for diffusion to take place? diffusion of water across a selectively permeable membrane. active transport.
What conditions are needed for the diffusion of materials into and out of the body?
Two conditions must be met for a substance to enter a cell by diffusion.
- The cell’s membrane must be permeable to that particular substance. This means, that substance must be able, somehow, to cross the membrane without breaking it.
- The concentration of the substance inside the cell is lower than it is outside.
What is meant by diffusion in science?
Diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
Does diffusion require energy input?
Does diffusion require energy? No diffusion doesn’t require energy. Diffusion directly through lipid bilayer and diffusion of hydrophilic molecules across a plasma membrane.
What are the two main differences between osmosis and diffusion?
In biology, this is a difference between the two processes. One big difference between osmosis and diffusion is that both solvent and solute particles are free to move in diffusion, but in osmosis, only the solvent molecules (water molecules) cross the membrane.
Where is active transport used?
Examples of active transport include: uptake of glucose by epithelial cells in the villi of the small intestine. uptake of ions from soil water by root hair cells in plants.