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2022-08-24   Video
Cellular Differentiation Along Concentration Gradients

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So let's look, for example, just at three cells here. They are equivalent in potential, they could give rise to any region of the nervous system, but by chance they occupy different posit...


2022-08-22   Intermediate
Why Evolution Is True

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Steve: In the last chapter of the your book, you tell us the story at the beginning where you've just spoken to a group of businessmen and one of them comes up to you afterwards and says, "I thought y...


2022-08-20   Video
Molecular Mechanism of Synaptic Function

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We're going to be looking at these electrical impulses, these flashes, which are called action potentials, are crossing three neurons in the circuit here. And as we look in higher po...


2022-08-16   Intermediate
Remarkable Creatures

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Steve: So let's talk about Remarkable Creatures. This is your newest book. First of all, for anybody who hasn't read Making of the Fittest or Endless Forms, you should go out and read those immediatel...


2022-08-16   Video
Cytotoxic T Cell in Action

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Well, let me show you this now, in a video that Mike Oldstone at Scripps Institute in San Diego put together. Let's run this. This is a cytotoxic T cell that you see on the top. And ...


2022-08-12   Video
Targeting Infected Cells for Immune Defense

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You remember messenger RNA and new viral proteins being made essentially to assemble new virions, but something else can happen to those viral proteins. There are host proteins called ubi...


2022-08-09   Pre-Intermediate
The Little Match Girl

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‘Matches! Light your fires with my matches! Would you like to buy some matches sir? What about you madam? They are the best kind! Strike them against any wall! They will burn! Someone must want some m...


2022-08-08   Video
RNA Splicing

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Once a gene has been located and transcribed into mRNA it must first be edited before it can be translated into a protein. This editing process is called splicing. It involves removing ...


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