Questions: (1) Region of the neuron where the action potential is generated (2) Sensory portion of the neuron (3) Terminal presynaptic neuron structure which comes close to the postsynaptic cell (4) Structure which propagates the action potential away from the cell body (5) Chemicals neurons use to communicate to other cells (6) Structure in which neurotransmitter is stored and released from via exocytosis

The answer is as follows:

1. Region of the neuron where the action potential is generated: The answer is: Trigger Zone of the Axon Hillock Explanation: The axon hillock is the region where the action potential is typically initiated due to the high density of voltage-gated sodium channels.

2. Sensory portion of the neuron: The answer is: Dendrite Explanation: Dendrites are the structures that receive sensory input from other neurons or the external environment.

3. Terminal presynaptic neuron structure which comes close to the postsynaptic cell: The answer is: Synaptic Knob Explanation: The synaptic knob (or terminal bouton) is the part of the neuron that comes close to the postsynaptic cell and releases neurotransmitters.

4. Structure which propagates the action potential away from the cell body: The answer is: Axon Explanation: The axon is the long, slender projection of a neuron that conducts electrical impulses away from the neuron's cell body.

5. Chemicals neurons use to communicate to other cells: The answer is: Neurotransmitter Explanation: Neurotransmitters are the chemicals that neurons release to communicate with other neurons, muscles, or glands.

6. Structure in which neurotransmitter is stored and released from via exocytosis: The answer is: Synaptic Knob Explanation: The synaptic knob contains vesicles filled with neurotransmitters, which are released into the synaptic cleft via exocytosis.

Summary:

1. Trigger Zone of the Axon Hillock
2. Dendrite
3. Synaptic Knob
4. Axon
5. Neurotransmitter
6. Synaptic Knob