If 21% of our atmosphere is oxygen and 78% of our atmosphere is nitrogen, are we able to attain our nitrogen levels in our body that we need through the air?
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Ответ:
That's why people say that we breathe oxygen- because while we inhale everything, we only use the oxygen.
Ответ:
here is your answer
Explanation:
Much of the energy, estimates suggest from 60% to 70%, is used to power transport mechanisms that maintain the Na+-K+ membrane potential required for the transmission of the nerve impulses. The brain must also synthesize neurotransmitters and their receptors to propagate nerve impulses.