During the krebs cycle NADH (Nicotinamide adenine dinucleotide) and FADH (<span>Flavin adenine dinucleotide) are made and used in the electron transport chan. Hope this helps!</span>
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This is not a question we can answer, this is a question only you can answer because it is asking for your personal belief on wether alien's exist outside of earth or not.
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higher altitudes have a lower level of oxygen which in turn, trains your lungs to hold and breathe more oxygen which also helps you cycle, run, etc. longer than usual
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José probably doesn't feel any pain because his body, during and after exercise released endorphins which are endogenous opioids. This endorphins promote a sense of satisfaction and pleasure, and make pain and discomfort feel irrelevant.
