Posts Tagged ‘ATP’

Mitochondria ion channels

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The primary function of mitochondria is to generate ATP that supplies cells with energy. Mitochondria are cell organelles comprising an outer and inner membrane, the latter enclosing a matrix space in which hydrogen and electrons are extracted. The inner membrane contains the respiratory chain; the energy from oxidation/reduction reactions is used to move protons out of the inner matrix and across the inner membrane. This establishes an electrochemical potential gradient across the membrane which allows the synthesize of ATP from ADP.

Energy and consciousness

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The authors argue that the conscious state is supported by a high and fairly uniform baseline energy consumption and related levels of neural activity. This viewed is based on PET scanning measures of glucose and oxygen consumption, taken with subjects under anaesthesia, that showed that energy levels while under anaesthesia are 40-50% below awake resting levels across different brain regions.