Seonglae ChoSpeaker of Protein Language
Cells
Cell Notion
E. coli chemotaxis: the baffling intelligence of a single cell
I want to tell the story of a beautiful phenomenon in biology. In some
sense it’s the prototype of much of the activity of life. The
phenomenon is the way in which an individual cell of
E. coli forages for nutrients. This process, known as
“chemotaxis”—the “chemo-” for chemical and the “taxis” from the Greek
τάξις, for tactics—is intelligence in one of
its most elemental forms. An individual E. coli has no brain,
obviously, and is even many orders of magnitude simpler than a human
cell, and yet already it possesses something like a sense of smell,
drive, even a memory. Chemotaxis recasts E. coli not as some
aimless gut-pest but rather as an exquisitely sophisticated
physical computer.
https://jsomers.net/e-coli-chemotaxis/
Your Body Killed Cancer 5 Minutes Ago
Sources & further reading: https://sites.google.com/view/sources-cancervsimmune/
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Somewhere in your body, your immune system just quietly killed one of your own cells, stopping it from becoming cancer, and saving your life. It does that all the time. The vast majority of cancer cells you develop will be killed without you ever noticing. Which is an incredibly hard job because of what cancer cells are: parts of yourself that start to behave as individuals even if it hurts you.
What is cancer and how does your body kill it all the time?
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How Do Dead Things Become Alive?
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Sources & further reading:
https://sites.google.com/view/sources-impossible-machines/
You are cells. Your muscles, organs, skin and hair. They are in your blood and in your bones.
Cells are biological robots. They don’t want anything, they don’t feel anything. They are never sad or happy. They just are, right here, right now. They are as conscious as a stone or a chair or a neutron star. Cells just follow their programming that has been evolving and changing for billions of years, molded by natural selection.
They are impossible machines and yet, here they are, driven entirely by the fundamental forces of the universe. The smallest unit of life, right at the border where physics becomes biology.
Sometimes, to get a truer understanding of how amazing something is, you need to hold your breath and dive in really deep. So, what are cells and how do they work?
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