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What is the pressure for diffusion that is produced by the concentration gradient?
Wiki User
∙ 13y ago
Osmotic Pressure. It exists anywhere that there is a soluble substance concentration gradient; that is, not only when a membrane separates substance concentrations.
See: Brownian Motion.
Wiki User
∙ 13y ago
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What if a cell has a lower concentration outside the cell?
There are two basic ways that individual molecules can enter (or leave) a cell.1. Diffusion. This is the movement of particles from a region of high concentration to a region of low concentration. So if the concentration of the molecule is higher outside the cell it can enter by diffusion. However diffusion can only take place down a concentration gradient ie from a high to a low concentration.2. Active transport. This is the movement of particles against their concentration gradient (ie from a low to a high concentration), using energy provided by the cell (ie ATP produced by respiration). So if a molecule is at a higher concentration inside the cell it can only be absorbed by active transport.
What is small scale winds produced by a locally generated pressure gradient?
Local winds
What ia an active transport using an example for explanation?
Active transport is similar to diffusion, in that it is the movement of molecules. However, whereas diffusion occurs passively and molecules move from an area of high concentration to an area of low concentration, active transport reverses this. Molecules are transported from an area of high concentration to an area of low concentration, and this requires energy in the form of ATP. Active transport accross a membrane takes place via specific transport proteins. ATP produced in respiration causes these proteins to change their 3D shape when a molecule binds with it, so that it is taken into the cell/transported from the cell against the concentration gradient. An analogy of a kissing gate can be used. So, for example, if the concentration of mineral salts inside a root hair cell is higher than that outside the cell in the soil, then diffusion cannot take place passively as the concentration gradient is not in the right direction. Mineral salts would not passively move from an area of low concentration (soil) into an area of high concentration (cell). In this case, active transport must be employed for the cell to absorb the ions in the soil. They bind to proteins on the cell membrane, which actively "carry" them into the cell using energy from respiration. In this way, the plant can absorb the mineral salts even though the passive diffusion gradient is the wrong way. Active transport can be defined as "the energy consuming transport of molecules or ions across a membrane against a concentration gradient, made possible by transferring energy from respiration."
What drives the ATP synthase reactions that produced ATP?
The proton gradient produced by the electron transport chain powers ATP production. This process is called chemiosmosis, in which H+ ions from the thylakoid space (in mitochondria they are in the intermembrane space) pass through ATP synthase to areas of lower concentration (in chloroplasts, the stroma, and in mitochondria, the mitochondrial matrix). As they pass through ATP synthase, the catalytic knob of the ATP synthase is turned. The turning of this knob (which is powered by diffusion of H+ ions) powers the anabolic production of ATP.
Force produced by a pressure difference?
The pressure gradient force is not actually a force but the acceleration of air due to pressure difference (a force per unit mass).
What is produced from an area of high pressure to an area of low pressure?
Diffusion occurs when an area of high pressure meets an area of low pressure. They mix together and create an equilibrium, all particles spread out equally.
How do ladybugs exchange gas?
The ladybug has spiracles (holes in their body) on their sides and the thorax (body section which wings and legs are attached to) through which the air enters. The oxygen then moves through the tubules in the ladybug's body along the concentration gradient to the respiring cells, and the carbon dioxide which is produced by the cells moves along the concentration gradient to the spiracles and leaves the insect.
How do endocytosis and exocytosis differ from diffusion?
i know a ton about this, learned it last year! Endocytosis is when a cell absorbs a protien by engulfing it. Exocytosis is the oppisite of endocytosis. This is how waste is produced (cell waste). It is the release of cell surface's substances through vesicles. TO remeber which is which just think of exocytosis as the waste is EXITING the cell and endocytosis is protiens ENtering the cell
What drives ATP synthase reactions the produced ATP?
Inside the intermembrane space, there is a buildup of hydrogen ions from the ETC. The hydrogen ions go down the concentration gradient through ATP synthase, producing ATP.
Why does carbon dioxide gas pass from the cells to bloodstream instead of vice versa?
Carbon dioxide is a waste product that is produced as a by-product of cellular respiration. It moves from the cells into the bloodstream by means of a concentration gradient. We then exhale the gas.
How is gluclose made?
Gluclose is made when diffusion is produced.
What is the difference between filtration and sedimentation?
If you are filtering something you are determining what parts liquid or solid can stay and what can go. If you are reabsorbing something that means the product has been produced and will then be brought back into the producer naturally. The difference between the two is the stuff that is filtered is not necessarily always reabsorbed.
