The question isn't clear enough. Does it mean the part that sends info. through the neuron (the axon)? Or does it mean the part that sends information to other neurons (the synapse)?
Axon terminals ( secretory region)
Braculai
Synapse
The synapse is the space between pre- and post-synaptic neurons
Synapse
Synaptic cleft
To "connect" two neurons, (or a neuron and a muscle cell), by providing a space between an axon terminal of one neuron and a dendrite of another neuron (or a muscle cell), so neurotransmitters that are released by an axon terminal can diffuse across that space to reach the dendrite (or muscle cell) and either initiate the possibility of the second neuron to fire or cause a muscle cell to contract.
Synapse
A synapse is a small gap at the end of a neuron that allows information to pass from one neuron to the next.
The synapse is the space between pre- and post-synaptic neurons
Sensory neurons are responsible for sending the initial message. First to a local neuron, which in turn communicates with a motor neuron. Therefore it is causing a reflex.
Synapse
neuromuscular junction
Synaptic cleft
To "connect" two neurons, (or a neuron and a muscle cell), by providing a space between an axon terminal of one neuron and a dendrite of another neuron (or a muscle cell), so neurotransmitters that are released by an axon terminal can diffuse across that space to reach the dendrite (or muscle cell) and either initiate the possibility of the second neuron to fire or cause a muscle cell to contract.
they cause vesicles containing neurotransmitter molecules to fuse to the plasma membrane of the sending neuron.
The synapse.
Synaptic Cleft.
Motor neuron