what is the difference between diffusion and bulk flow?
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Diffusion vs. "Bulk flow" is the movement/flow of an entire body due to a pressure gradient (for example, water coming out of a tap). "Diffusion" is the gradual movement/dispersion of concentration within a body, due to a concentration gradient, with no net movement of matter.
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1 Answer. Diffusion is the movement of one specific molecule from a high concentration area to a low concentration one. Filtration is the movement of a fluid (mixture of several molecules) from a region of high pressure to a region of a low pressure.
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Simple Diffusion. movement of a solute from an area of high concentration to an area of low concentration. Passive Transport. requires NO energy, movement of molecules from high to low concentration, moves with the concentration gradient.
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Differences: Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.
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Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place.
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In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.
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Like the active transport processes that move ions and small molecules via carrier proteins, bulk transport is an energy-requiring (and, in fact, energy-intensive) process. Here, we'll look at the different modes of bulk transport: phagocytosis, pinocytosis, receptor-mediated endocytosis, and exocytosis.
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Explanation: When the cell increases in size, the volume increases faster than the surface area, because volume is cubed where surface area is squared. When there is more volume and less surface area, diffusion takes longer and is less effective.
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While osmosis is defined specifically as the diffusion of water across a semi-permeable membrane. Latter are very thin layers of material that allow small molecules, like water to pass through but do not allow larger molecules to pass through. They both relate to movement of molecules.
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Diffusion occurs with or without a membrane between two areas of different concentrations of molecules. However, osmosis only occurs across a semipermeable membrane, a membrane that prevents many particles or molecules to freely travel between the two sides, while allowing water to pass through.
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The main difference between the two is that diffusion can occur in any mixture, even when two solutions aren't separated by a semipermeable membrane, whereas osmosis exclusively occurs across a semipermeable membrane.
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Both involve ion movement. Both use ion channels to move ions across the cell membrane, in or out of the cell. ... Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP.
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Diffusion is the movement of particles down their concentration gradient, meaning they flow from places of high concentration to places of low concentration. When the substance diffusing is water, the process is called osmosis. ... The two main types of diffusion are passive diffusion and facilitated diffusion.
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Requires energy; diffusion and osmosis are types of passive transport. ... Passive transport moves materials through a cell membrane without using energy while active transport uses energy to move materials through a cell membrane. They are both moving materials through the cell membrane.
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Bulk density is defined as the dry weight of soil per unit volume of soil. Bulk density considers both the solids and the pore space; whereas, particle density considers only the mineral solids. Figure 2.6 illustrates the difference between bulk density and particle density.
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-They both account for movement of molecules from a region of high concentration to a region of low concentration. -As for osmosis;the movement of molecules are via a selectively permeable membrane. NB:only water molecules. -Diffusion is the movement of all kinds of molecules.
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Passive transport moves across a concentration gradient, or a gradual difference in solute concentration between two areas. Simple diffusion is the diffusion of small, uncharged, or hydrophobic molecules from an area of high concentration to an area of low concentration across the cell membrane.