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The following question refers to comparative concentrations, permeabilities, and potentials under various circumstances. Indicate the relationship between the two items listed in each situation by filling the appropriate letter in the blank using the following answer code:
-A. permeability of a resting nerve cell membrane to K+
B. permeability of a nerve cell membrane to K+ during the falling phase of an action potential
Neurotransmitter Receptor Sites
Specific locations on nerve cells where neurotransmitters bind to initiate or inhibit electrical signals, facilitating communication between neurons.
Dendrites
Branch-like extensions of neurons that receive electrochemical messages from other neurons for transmission to the neuron cell body.
Axon Terminals
The distal terminations of axons, specialized for the release of neurotransmitters to communicate with other neurons or muscles.
Axon Tips
The distal extremities of an axon, which play a key role in transmitting signals to other neurons or muscle cells.
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