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An action potential comes down the yellow neuron and a neurotransmitter is released to the purple neuron.  When an action potential comes down the purple neuron, it does not release it any neurotransmitters (even though it has them).  What did the neurotransmitter from the yellow neuron do?

____________ open or close in response to binding specific molecules.

Which of the following is a type of glial cell found in the peripheral nervous system? 

The branch of the autonomic nervous system that is activated during excerise and activity is the:

Graded potentials could be generated in which part of the neuron?

The spinal cord decreases in diameter as you move inferiorly.

Match the following neuroglia with the correct function.

The part of the peripheral nervous system that carries sensory information to the CNS is designated: 

Put the following spinal nerve structures in order of most proximal to most distal from the spinal cord.

An action potential arrives at the bottom of the purple neuron and nothing happens; 5 minutes later an action potential arrives at the bottom of the black neuron just as another action potential arrives at the bottom the purple neuron 1 msec later and the orange neuron sends an action potential.  This is an example of: