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Its good because it would allow just the good things in and not the bad things in like viruses because it could help you not get sick and be safe especially from disease.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoWiki User
∙ 14y agoCells create and carefully maintain electrochemical gradients so that they can perform cellular respiration and do other things like fire action potentials (neurons).
Wiki User
∙ 9y agoSelective permeability is important because it allows only the useful substances to get in instead of other substances that can affect the cell's system.
Wiki User
∙ 11y agoYou won't want too much of anything, because the cell wouldn't be able to handle it, or too little of anything, cause the lack of it will bring many problems.
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How is the membrane permeability?
means that the cell membrane has some control over what can cross it, so that only certain molecules either enter or leave the cell
What is selective permeability and why is it important to cells?
It permits to enter different important ingredients and different types of salts to cytoplasm which is important to cell growth, function and metabolism but don't allow to transmit any unnecessary and harmful constituents such as unnecessary amino acid, not to use in protein synthesis then, different types of harmful drug which we take as medicine. So we can see it allow only selected item. That's why it is called as SelectivelyPermeable Membrane.
Why are biological membranes are composed largely of lipids?
The lipid bilayer of a cell allows for selective permeability. This means that only the substances that are allowed to get in and out can pass through the lipid layer.
Why is bromine selective?
Bromine is less reactive than chlorine (and much less so than fluorine) so it is selective when it comes to halogenation substitution reactions.
What is relationship between particle size and permeability?
As soil particle size increases so does permeability. I am doing Earth Science in 8th grade and 9R in 8th grade
How is the membrane permeability?
means that the cell membrane has some control over what can cross it, so that only certain molecules either enter or leave the cell
Why is selective permeability important?
Selecive permeability is important because it keeps cells functioning properly by letting only wanted molecules (solutes) in and unwanted solutes out. In addition to keeping the "bad stuff" out (e.g. bacteria, viruses), selective permeability is essential to the function of our nervous system. Without it, our neurons would not "fire". This is because selective permeability (think sodium potassium protein pump and active transport that requires ATP), creates a negative membrane potential. At rest potassium ions flow out but the membrane is impermeable to sodium ions. Neuron to neuron signaling occurs when there is a depolarization at an axon that causes the permeability to temporarily "switch" so that potassium and sodium ions can enter the cell. This triggers an action potential which jumps along nerve cells. This action potential is converted into a chemical signal as it triggers a calcium ion influx which in turns triggers the production and transportation of neurotransmitter-vesicles, and exocytosis into the synapse between neurons. Receptors on the adjacent neuron receive the neurotransmitter and the "signal" is communicated onwards. Protein pumps return levels of Na, K and CA to "resting" levels awaiting the next signal. Without selective permeability gradients of Na, K, CA and other ions could not be created to "drive" these and other processes. There is much more that can be said about selective permeability. It allows glycoproteins to sit in the cell membrane and act as antibodies and glycolipids to act as signals on the cell membrane. Proteins embedded in the cell membrane can change shape and respond to feedback loops controlling the influx and efflux of substances and maintaining homeostasis.
What is selective permeability and why is it important to cells?
It permits to enter different important ingredients and different types of salts to cytoplasm which is important to cell growth, function and metabolism but don't allow to transmit any unnecessary and harmful constituents such as unnecessary amino acid, not to use in protein synthesis then, different types of harmful drug which we take as medicine. So we can see it allow only selected item. That's why it is called as SelectivelyPermeable Membrane.
Why are biological membranes are composed largely of lipids?
The lipid bilayer of a cell allows for selective permeability. This means that only the substances that are allowed to get in and out can pass through the lipid layer.
What is a selective barrier regulating the passage of materials into and out of the cell?
In a plant cell, this selective barrier is known as the cell membrane but also a plant cell has a cell wall. The cell membrane is semi permeable allowing only certain materials so the cell membrane allows in materials and the cell wall ''digests it''. While in a plant cell does not have a cell wall only a cell membrane.It is the cell membrane that acts as its selective barrier.
Why is the Selective Service System so important?
The Selective Service System is important because it ensured that in times of crisis, the United States will be prepared for war. They do this through a lottery-based system of men who have registered.
Why is a cell so important?
A cell is important because you could not live without them.
Does the nervous system use chemical and electrical energy?
The two major features that distinguishes nervous tissue is that selective permeability to ions is controlled by voltage and receptor controlled channels and that the density of ion pumps is much greater than that found on non-excitable membranes. The potential difference between the inside and and outside of a cell (most neurons are negative with respect to outside the cell) is the result of moving ions. So it is a change in the chemical composition inside the cell that results in an electrical change.
Why is the cell membrane described as being a selective barrier?
Cell membranes are selective barriers because they only let certain substances pass through and therefore ensures the cells survival.
Why are chloroplasts so important in a plant cell?
so that the cell can get the food and nutrients it needs
Why is the cell so important?
The cell is so important because it keeps you in touch with your friends and family. some people think their cell is their life. and you think why not use a telophone but you can also text on a cell.
If a material has a high conductivity does it have a high permeability and if so what would be an approximate permeability for the high conductive material?
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