🧠 Neuroscience — Intro#

Scope — Fundamental organization of the nervous system, basic neuron structure, and how electrical signals are generated and transmitted.

Key concepts#

• Neuron — excitable cell specialized for information transmission.
• Glial cells — support, insulate, and modulate neuronal activity.
• Action potential — rapid electrical signal traveling along the axon.

Seed Q&A triads#

• Q: What are the main parts of a neuron and their functions?
  A: Dendrites receive input, the cell body integrates signals, the axon conducts action potentials, and synaptic terminals transmit signals to other cells.

• Q: How does an action potential start?
  A: When membrane depolarization reaches threshold, voltage‑gated sodium channels open, causing a rapid influx of Na⁺ ions.

• Q: Why are glial cells essential for neural function?
  A: They provide metabolic support, regulate extracellular ions, form myelin, and influence synaptic signaling.

Quick activities#

• Label a neuron diagram and trace the direction of signal flow from dendrite to synapse.