These Are The Best Under-$25 Impulse Buys, According To People Who Bought Them
Impulse buys are not always the enemy. I often struggle with pulling the proverbial trigger on even affordable purchases that ...
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PR Interval
This represents the time that it takes for the electrical impulse generated in the sinus node to travel through the atria and across the atrioventricular node to the ventricles. The normal PR ...
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How does the nervous system help us respond? - OCR 21st Century
An electrical impulse cannot directly cross the gap so a different mechanism has to be used.
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Cells of the nervous system, neurotransmitters at synapses
An electrical impulse cannot directly cross the gap so a different mechanism has to be used. Between impulses the transmitter molecules are rapidly removed from the synaptic cleft to prevent ...