What is the term for the space where axon collaterals of one neuron meet dendrites of another neuron?

The term for the space where axon collaterals of one neuron meet dendrites of another neuron is known as a synapse. A synapse is a critical junction between two neurons where communication occurs, allowing for the transmission of signals. This space facilitates the transfer of electrical or chemical signals through neurotransmitters released from the axon terminals into the synaptic cleft, which then bind to receptors on the dendrites of the adjacent neuron.

In this context, understanding the synapse's role is essential for grasping how neuronal communication influences various functions in the nervous system, including reflexes, learning, and memory.

Other terms like the synaptic cleft refer specifically to the gap between the neurons within the synapse, while dendritic junction and neurotransmitter site do not accurately describe the entire structure where the interaction occurs. The synapse encompasses the site of contact as well as the cleft through which communication transpires, making it the more comprehensive and correct term in this scenario.