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Nov 8, 2020 · A concentration gradient occurs when a solute is more concentrated in one area than another. A concentration gradient is alleviated through diffusion, though membranes can hinder diffusion and maintain a concentration gradient. Overview. “Concentration” refers to how much of a solute is in a given amount of solvent.
- Gabe Buckley
Concentration gradients. Particles move from high to low concentration areas, a process called diffusion. Each particle type has its own unique concentration gradient. This movement isn't planned, but happens randomly. Over time, particles spread evenly, balancing the probability of movement in all directions.
- 3 min
- Sal Khan
- In concentration gradient, what happens at equilibrium?Equilibrium is when the molecules are distributed evenly in an area. The concentration gradient is removed at equilibrium, but particles will conti...
- What is the goal of a concentration gradient?There is no goal in concentration gradient, this is just an effect of the constant motion that particles have.
- At 1:27, Sal said that concentration gradient can be blocked, HOW?By putting any kind of barrier in the form of something impermeable between molecules. In that case, molecules cannot move.
- how do cells create concentration gradients?Well, the presence of the membrane itself helps to create a concentration gradient. Once you have a barrier it helos creating 2 different compartme...
- he talks about how it's just them bouncing around but my question is "what is actually causing them ...their temperature i.e. average kinetic energy
- Does a concentration gradient exist regardless of membrane permeability? For example, if I have 140m...No, since the membrane is not permeable. Then you have two containers with different concentrations but there is no connection between those contai...
- how can we identify when it goes from low to highit usually doesn't you can check the concentration but this is not likely by a lot
- Is difussion happening all the time? I mean, are the always concentration gradients? Why do they "ha...Yes, diffusion happens, because atoms are always moving (you can feel it as the temperature of something) and because they collide they have very r...
Aug 25, 2023 · Figure 5: Resting potential definition and example. Image prepared by Maria Victoria Gonzaga of Biology Online. Proton gradients; A proton gradient (also called H+ gradient) is a gradient that forms from differences in proton concentration between the inside and outside of a biological membrane. A proton pump is the membrane protein that ...
The simplest forms of transport across a membrane are passive. Passive transport does not require the cell to expend any energy and involves a substance diffusing down its concentration gradient across a membrane. A concentration gradient is a just a region of space over which the concentration of a substance changes, and substances will ...
- Why no energy is spent on switching the carrier proteins?These carrier proteins are gated trans-membrane proteins and do not require ATP (adenosine triphosphate) to function. The gate is activated due to...
- What is the difference between simple diffusion and facilitated diffusion?Simple diffusion is the movement of molecules through a cell membrane without using the channels formed by integral membrane protein. Facilitated d...
- Can carrier proteins move molecules from the inside to the outside? Also, is it possible to replace ...Yes and it depends but generally yes the big thing to keep in mind is that many of these gates are evolving randomly. So getting the most efficient...
- I noticed that according to the quiz (Practice: Passive transport) sodium, potassium, and calcium ca...Yes , i also think that question is wrong. There are channel proteins in the body for transport of those ions. Sodium : Voltage gated Channel Prote...
- the topic states above that "a concentration gradient itself is a form of stored (potential) energy"...A concentration gradient will cause movement of molecules from high concentration to low concentration. Therefore, it is a driving force for the mo...
- If a molecule wanted to diffuse across the plasma membrane, but wasn't able to make it all the way t...Interesting question, I don't know if anyone has looked into whether membranes might get "gummed up" by material getting stuck part way through. On...
- What is faster, a simple diffusion (of oxygen, for example), or a facilitated one (of water through ...I don't think there is a general rule (leaning toward facilitated but I have counter examples too). However, you cannot use passive diffusion to mo...
- What is osmosisThe movement of water across a concentration gradient.
- if particles moves from low concentration to higher concentration can we call it the concentration g...Careful: it moves from HIGH to LOW, not the other way around. That said, this is also the definition of a _gradient_: it changes as you move from h...
- Which of these cells can help to move and transport bloodBlood is a cell, not a particle. That means that it could not be diffused. It actually gets transported by blood vessels, which are long chains of...
Dec 19, 2015 · Movement like this is called diffusion. Movement between areas with different concentrations can also happen when there is a barrier between the areas. Inside of organisms, these barriers are often membranes. Membranes are sheets of material that act as boundaries. As an example, membranes surround cells.
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What is a concentration gradient?
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8 years ago. An "electrochemical gradient" is a combination of two factors: an "electrical potential difference" between the inside and outside of the membrane and a "concentration gradient." In Khan's example, the "electrochemical graident" is established due to the sodium/potassium pump and the carrier protein's ability to allow potassium to ...
- 5 min
The idea of concentrations and the gradients within them is important when understanding the movement of particles or molecules across cell ... Biology: Exam-style questions; Bitesize revision ...
