Examlex
Hubble's Law starts as a plot of recessional ________ versus distance to the galaxies.
Myelin
A fatty substance that surrounds and insulates the axons of some neurons, enhancing the speed and efficiency of electrical signal transmission.
Refractory Periods
Periods immediately following an action potential during which a neuron is unable to fire another action potential or the firing rate is significantly reduced.
Calcium Channels
Ion channels in cell membranes that allow the movement of calcium ions into or out of a cell, playing key roles in various physiological processes.
Refractory Periods
Intervals following an action potential during which a neuron or muscle cell is less responsive to further stimulation.
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