Final answer:
Neurons change as the strength of synaptic connections is altered through synaptic plasticity, which is important for a functioning nervous system and for learning and memory.
Step-by-step explanation:
Neurons are not static and unchanging, but they change as the strength of synaptic connections is altered.
Synaptic plasticity allows for these changes, which are necessary for a functioning nervous system.
Two forms of synaptic plasticity, called long-term potentiation (LTP) and long-term depression (LTD), are important for learning and memory.