Global cooling because it habitat was too cold and also there cooled blooded and so the change in temperature severely decreased their population so they died out.
Answer:
Water & Amino acid glycine
Explanation:
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it goes throug the nerves to where your brai want to move the part
example
you want to walk it send signals to right leg thern left leg
Answer:
the eupopeans introduced horse to the americans, as the native american living there already had turkeys,corn,and wheat.
<span>This might disrupt the ability of a neuron to fire and action potential. If the influx of positive ions is blocked the neuron will not reach the necessary threshold required to fire an action potential. Since an action potential only fires when the neuron reaches the correct voltage threshold even a small increase in the number of positive ions entering the neuron might block it from firing an action potential.</span>
