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Hace 1 día · The Telomere Age Theory posits that telomere length is a biological marker of aging. As cells divide over time, telomeres become progressively shorter, eventually leading to cellular senescence or apoptosis (programmed cell death). Senescent cells lose their ability to divide and function properly, contributing to the aging process and the ...
Hace 1 día · NAD—short for nicotinamide adenine dinucleotide—is a cellular coenzyme responsible for turning the food you eat into usable energy. It also plays a major role in DNA repair, cellular processes, and immune system function. Even though the body produces NAD naturally, its production of NAD declines as you age.
Hace 6 días · As an action potential (nerve impulse) travels down an axon there is a change in electric polarity across the membrane of the axon. In response to a signal from another neuron, sodium- (Na +) and potassium- (K + )–gated ion channels open and close as the membrane reaches its threshold potential. Na + channels open at the beginning of the ...
Hace 4 días · These findings offer a unique comparison to the biophysical evolution of other collective cellular dynamics such as the aforementioned jamming transitions in epithelial monolayers, which have been shown to be highly sensitive to the relative strength of cell-cell and cell-matrix contacts .
Hace 5 días · Frontiers in Cellular Neuroscience. doi 10.3389/fncel.2024.1414704. Part of the world's most cited neuroscience journal series that advances our understanding of the cellular mechanisms underlying cell function in the nervous system across all species.
Hace 1 día · Despite exhibiting slightly reduced cellular compatibility and bone ingrowth under non-mechanically stimulated conditions like the femoral condyle, β-TCP/PCL composite scaffolds demonstrated superior new bone quality and quantity in complex, mechanically demanding environments such as radial defects, an enhanced performance attributed to their gradient structure that confers improved strength ...
Hace 8 horas · The brain’s cleaning system. Since the brain is an active tissue – with many metabolic and cellular processes happening at any moment – it produces a lot of waste. This waste is removed by our glymphatic system. Cerebrospinal fluid is a crucial part of the glymphatic system.
