The Thing Inside Your Cells That Might Determine How Long You Live.pdf

The Thing Inside Your Cells That Might Determine How Long You Live.pdf

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Article : The Thing Inside Your Cells That Might Determine How Long You Live “We think the nucleolus plays an important role in regulating the life span of animals,” said Adam Antebi, a cellular biologist. The nucleolus is the cell’s ribosome factory. Ribosomes are like micro -machines that make proteins that cells then use for purposes like building walls, forming hairs, making memories, communicating and starting, stopping and slowing down reactions that help a cell stay functioning. It uses about 80 percent of a cell’s energy for this work. The n ucleolus can wax and wane in response to a body’s available nutrients and growth signals. The more growth signals it intercepts, the more machines, or ribosomes, it makes. It gets bigger to contain them, but mysteriously this also shortens a cell’s or organism’s life. When food is restricted, or a metabolic pathway is silenced or slowed down, nucleoli shrink, making fewer
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