Which orbital is the lone pair of each N in, sp2 or p? 
Definitions:
Graded Potentials
Changes in membrane potential that vary in size and do not follow the all-or-none principle, important in the initiation of action potentials.
Sodium-Potassium Pump
A vital cell membrane protein that exchanges sodium for potassium across the plasma membrane, critical for cellular functions.
Divergence
The functional arrangement of neurons in which a neuron sends signals to two or more postsynaptic neurons. Compare with convergence.
Nitric Oxide
A gas that functions as a signaling molecule in the body, playing roles in the immune system, neurological system, and regulation of blood vessels.
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