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What name is given to the process by which substances pass into or out of a cell from an area of higher concentration to an area of lower concentration?
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∙ 6y ago
diffusion
Matapang Ako
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Passive transport requires no what?
Passive transport occurs when substances cross the plasma membrane without any input of energy from the cell. No energy is needed because the substances are moving from an area where they have a higher concentration to an area where they have a lower concentration. Concentration refers to the number of particles of a substance per unit of volume. The more particles of a substance in a given volume, the higher the concentration. A substance always moves from an area where it is more concentrated to an area where it is less concentrated. It's a little like a ball rolling down a hill. It goes by itself without any input of extra energy.
What is a solute pump?
Under normal circumstances, chemical concentrations in any given solution tend to even themselves out, by diffusion, and by the normal process of entropy. Cells often need to have a higher concentration, or a lower concentration of some chemical (which is a solute, because it is dissolved in water) than the concentration that exists outside the cell in the intercellular fluid, the lymph, the blood, or the cerebro-spinal fluid, as the case may be. In order to obtain that difference in concentration it is necessary to have some mechanism in the cell membrane that will actually pump the chemical in question, either out of the cell or into the cell, depending upon whether it is a higher concentration or a lower concentration that is needed. So, there are protein structures that can do this. Those are the solute pumps.
Which substances are released during respiration?
during cellular respiration organisims take in oxygen from their surroundings and combinet with sugar and other carbon containing substances to release enrgy tored in them. during cellular respiration organisims give off carbon dioxide gas in to there surroundings, during this prosess water is given of into the surroundings to!
What two substances are given off during respiration and used again during photosynthesis?
Glucose and oxygen are used up during respiration.
What is the process by which polar substances dissolve in water are pulled apart?
Nitrogen fixation
How are dilutions of substances prepared given a prepared concentration?
KDIE
What percentage of the solution is dissolved substances?
This is the concentration of a solute in a solvent at a given temperature and pressure.
Is it true that water tends diffuse from a region where it is lees concentrated to a region where it is highly concentrated?
It is not true. All substances tend to diffuse from an area of higher concentration to that of lower concentration. This is called passive transport(no energy required), or in the case of water, Osmosis. However, if given energy, they can also move from an area of lower concentration to that of higher concentration. This process is called active transport.
Passive transport requires no what?
Passive transport occurs when substances cross the plasma membrane without any input of energy from the cell. No energy is needed because the substances are moving from an area where they have a higher concentration to an area where they have a lower concentration. Concentration refers to the number of particles of a substance per unit of volume. The more particles of a substance in a given volume, the higher the concentration. A substance always moves from an area where it is more concentrated to an area where it is less concentrated. It's a little like a ball rolling down a hill. It goes by itself without any input of extra energy.
What is the name given substances whose pH is less than 7?
acidic, alkaline higher than 7
How do you know which solution has a higher sugar concentration?
"Which" indicates that you were given alternatives to chose from. Without knowing those, we can't help you.
What is the process to follow if given an unlawful order?
Refuse the order and report to higher authority.
What name is given to the process where hot mixtures of water and dissolved substances react with existing minerals to form minerals?
Hydrothermal alteration.
What is the difference between relative concentration and precise concentration?
Relative concentration gives you a comparison of two or more solutions, telling you which has a higher concentration of some solute than the other. Precise concentration would normally be expressed in terms of moles per liter, and it tells you the actual amount of a solute that is present in a given volume of solution.
What general name is given to substances that conduct electricity in a solution?
A Liquid that conducts electricity and is decomposed in the process is called electrolyte.
How does diffusion show that molecules are always moving?
How? Molecules move from an area of higher concentration to an area of lower concentration. When the concentration decreases (be it determines by a measure of pressure) in a unit volume; that indicates there are less molecules occupying that given space. So they must have gone somewhere...
If the concentration of reactants is higher?
The rate of the forward reaction will increase if the concentration of the reactants is increased.This is explained by collision theory. When there are more molecules in a given space (a higher concentration) with the same energy, the molecules will collide more frequently, since they will move about randomly and are more likely to hit one another if there are more of them around and less empty space. A reaction requires a collision, so more collisions in a given amount of time will lead to more molecules reacting in that time, giving a higher rate of reaction overall (in the forward direction).
