Resting membrane potential: channels are closed (inactivation na gates are open, no ion-gated channels open only leak channels stimulus)

2) depolarization: na+ activation gates open, threshold is reached -55mv, sodium flows in, positive feedback loop (more depolarization, more gates opening, more na+ flowing in all the way to about +35mv)

3) repolarization: peak happens because the na+ inactivation gates are fully closed, k+ channels then open

4) hyperpolarization: na+ activation gates close below threshold, k+ gates are still open, too much k+ flows out of cell because the gate is slow, making rmp too low
-- k+ ion absorbed by astrocytes on outside to reset the charges to about -70mv as well as the sodium potassium pump bringing back the maintaining chemical gradient by throwing out na+ and bringing k+ back in

98 points you will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forces choose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.