Answer: synapse.
- A synapse
- B axon
- C dendrite
- D myelin node
Correct answer: A. synapse
Explanation: A synapse is the gap between neurons where the impulse is relayed, usually via neurotransmitters.
Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Brain, spinal cord, neurons, reflex arcs, and sense organs.