1) Bill has lost feeling in his left foot. Briefly describe 3 possible locations of injury that could result in this symptom and explain how each injury results in this symptom.
2) The effect of a neurotransmitter on a postsynaptic neuron is typically very brief because the concentration of the neurotransmitter in the synaptic cleft decreases rapidly soon after the transmitter is secreted by the presynaptic neuron. Describe 3 mechanisms by which the transmitter is removed.
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