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What is equilibrium with respect to movement of molecules across a cell membrane?
Wiki User
∙ 7y ago
that happens when osmosis occurs
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoOsmosis
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What is the significance of donnan equilibrium to the biological system?
The Donnan equilibrium effect can be correlated to living cells. Cell membranes are selectively permeable, which means that they allow some molecules to pass through while keeping others out.The flow of molecules and ions between a cell and its environment is regulated by the Donnan effect. Living cells contain impermeable anionic colloids, which are mostly made up of proteins and organic phosphates; and these colloidal anions cannot cross the cell membrane.As a result of this, there is a high concentration of non-diffusible anions across the cell membrane, thus creating the Donnan Equilibrium. This means that there are more ions inside the cell than outside. For ease of explanation let's call this Donnan Equilibrium 1.What does this do to cells? Water will continuously move into the cell by the process of osmosis. If this process continues, the cells will inevitably rupture.What is the mechanism that prevents cells from swelling and rupturing?The answer is the sodium pump (Na⁺- K⁺ ATPase) in the cell membrane. It is the most ubiquitous system in animal cells. The presence of the ATP-driven Na⁺ and K⁺ pump is nature's way of preventing cells from rupturing by continuously pushing out excess ions. The pump together with the membrane's low permeability to sodium effectively prevents sodium from entering the cell. The sodium pump renders the membrane impermeable to sodium, setting up a second Donnan Equilibrium (let's call this Donnan Equilibrium 2).The earlier Donnan effect (Donnan Equilibrium 1) with respect to impermeable anionic colloids balances the latter Donnan effect (Donnan Equilibrium 2) of impermeable extracellular sodium. The balancing act between these two effects is by way of allowing cells to maintain and regulate normal cell volume in living functions.Hope this answers the question.
What is the purpose or goal of diffusion?
The ultimate goal is to produce Proteins and Carbohydrates for the cell and their organelles.
Does cholesterol serves no function in the cell?
It functions by serving its purpose of being in the plasma membrane. Which is to give the membrane more fluidity in normal and low temperatures and to prevent the membrane from being too fluid in high temperatures in respect to the membrane.
What does it mean when you say plasma membrane is permeable?
A porous membrane has openings scattered on its surface of various size and frequency. This means that such membranes allow various substances to pass through. Any molecules that are larger than the membrane's openings will not pass through.
The fact that a cell has an electrical potential difference across its membrane makes that cell what?
The cell membrane is semi-permeable so that charged ions can not diffuse down or up a concentration cell into or out of the cell. There are cell bound proteins that transport charged ions like K+, Na+ and Ca2+ across the cell membrane and the net effect is that the cell is negatively charged ( about -70 mV) with respect to the extracellular space.
What can you conclude about the permeability of potato cytoplasm with respect to sucrose and water molecules?
H20 molecules can pass through the membrane freely, however sucrose molecules are too large.
The condition when the net force of an object equals zero?
When the object is at rest with respect to the frame of reference chosen.
What is the significance of donnan equilibrium to the biological system?
The Donnan equilibrium effect can be correlated to living cells. Cell membranes are selectively permeable, which means that they allow some molecules to pass through while keeping others out.The flow of molecules and ions between a cell and its environment is regulated by the Donnan effect. Living cells contain impermeable anionic colloids, which are mostly made up of proteins and organic phosphates; and these colloidal anions cannot cross the cell membrane.As a result of this, there is a high concentration of non-diffusible anions across the cell membrane, thus creating the Donnan Equilibrium. This means that there are more ions inside the cell than outside. For ease of explanation let's call this Donnan Equilibrium 1.What does this do to cells? Water will continuously move into the cell by the process of osmosis. If this process continues, the cells will inevitably rupture.What is the mechanism that prevents cells from swelling and rupturing?The answer is the sodium pump (Na⁺- K⁺ ATPase) in the cell membrane. It is the most ubiquitous system in animal cells. The presence of the ATP-driven Na⁺ and K⁺ pump is nature's way of preventing cells from rupturing by continuously pushing out excess ions. The pump together with the membrane's low permeability to sodium effectively prevents sodium from entering the cell. The sodium pump renders the membrane impermeable to sodium, setting up a second Donnan Equilibrium (let's call this Donnan Equilibrium 2).The earlier Donnan effect (Donnan Equilibrium 1) with respect to impermeable anionic colloids balances the latter Donnan effect (Donnan Equilibrium 2) of impermeable extracellular sodium. The balancing act between these two effects is by way of allowing cells to maintain and regulate normal cell volume in living functions.Hope this answers the question.
What is the wall of respect movement?
barbara jones-hogu
What is the purpose or goal of diffusion?
The ultimate goal is to produce Proteins and Carbohydrates for the cell and their organelles.
Does cholesterol serves no function in the cell?
It functions by serving its purpose of being in the plasma membrane. Which is to give the membrane more fluidity in normal and low temperatures and to prevent the membrane from being too fluid in high temperatures in respect to the membrane.
What concepts of the Civil Rights Movement were embraced by the Hippie Movement of the 1960s and 1970s?
respect and social dignity
A change in a position in respect to a reference point is called?
movement or motion
What is membrane sidedness?
The cell membrane regulates the flow of materials in and out of the cell. Membrane sidedness is an important concept in cell biology because to gives a better understanding on how the cell membrane functions.
Why does viscosity vary with respect to temperature?
the increase in temperature increases the K.E of the molecules and distances among molecules therefore the force of friction decreases as the result of which molecules move faster and viscosity becomes decreased....
How do the song respect relate to the civil rights movement?
because it comes the soul that's why
What does your friend appear to be at rest even though the bus is moving?
Any movement must be specified IN RELATION TO SOMETHING. You can specify movement with respect to Earth, or with respect to the bus. Both are equally valid.
