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Hello everyone.
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So in this video we are going to solve a glucose uptake question.
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Okay, we have a rbc which is placed in an isotronic solution.
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So isotonic solution does not show any concentration gradient.
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That's what isotonic solution is about.
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And this isotronic solution contains radio labeled glucose.
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And as time progress, the scientists observe an increase in radio label glucose inside this.
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Cell.
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Why? how does the cell enter the cell membrane? did it pass through the specific proteins or did it simply pass the cell membrane or expend energy to transport glucose or did not expend energy to transport glucose? this is what we are going to explain now.
00:47
So usually glucose from the bloodstream enters the cell through a process called facilitated diffusion.
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Facilitated diffusion is a passive transport process through which glucose enters through enters the cell from the bloodstream through a transporter called glute four transporter.
01:10
So this is the glute four transport.
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Through this transporter, the cell, the glucose enters the cell with respect to the concentration gradient.
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Now you can see, so this is the interior of the cell.
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And the outside of the cell contains from the diagram you could infer that the outside of the cells.
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So this is the exterior contains a large amount of glucose compared to the interior of the cell.
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So the exterior is nothing but the bloodstream.
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So from the bloodstream now with respect to the concentration gradient, glucose enters the cell through glute transporter.
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Are and this is known as the passive diffusion.
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So from higher concentration to lower concentration.
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So this is a passive transport with the help of a carrier protein because glucose couldn't simply transport or pass the cell membrane.
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So it makes use of the carrier protein called glute.
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So this is about the facilitated diffusion.
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And another transport process through which the glucose could enter the cell is the secondary active transport.
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In this secondary, this is called secondary active transport because i will tell you why.
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Active transport, passive transport is something without the concentration gradient.
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But active transport is transport of molecules against the concentration gradient.
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But what happens here is this is the sodium potassium pump.
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So let me mention it.
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Sodium potassium pump.
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So sodium potassium pump, we all know that it transports sodium and potassium into an out of the cell...