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A 4-year-old child is shown a row of seven red checkers. He is asked to place a black checker immediately above each red one. By doing so, the child agrees that there are as many red as black checkers. The experimenter then spreads out the black checkers so that the line they form is longer than the one formed by the red checkers. The experimenter asks whether there are more red checkers or more black checkers in order to determine whether the child understands:
Graded Potential
Small voltage fluctuation across the cell membrane.
Voltage-Sensitive
Referring to mechanisms or devices that respond to changes in electrical potential or voltage across their membrane or structure.
Nerve Impulses
Electrical signals that transport information along the neurons, facilitating communication within the nervous system.
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