Inside the Neuron! 🔬🧬
🏠 Cell Soma: The Command Center
- Cell Body 🏢: Contains all the important stuff! Control center of neuron! 🎮
- Metabolic Hub 🔥: Where energy production happens! Keeps cell alive! 💪
- Integration Point 🧮: Processes incoming signals! Decision maker! 🧠
🧬 Nucleus & Ribosomes
- Nucleus 💎: Contains DNA! Genetic control center! Blueprint of the cell! 📋
- Ribosomes 🏭: Protein factories! Create neurotransmitters and structural proteins! ⚙️
- Nissl Bodies 📦: Clusters of ribosomes! Visible under microscope! Manufacturing centers! 🔬
⚡ Axon Structure: The Cable!
- Axon Hillock 🏔️: Where action potential STARTS! Trigger zone! 🎯
- Axon Length 📏: Can be over 1 meter long! Longest part of neuron! 🦒
- Terminal Buttons 🔘: End bulbs! Release neurotransmitters! Communication endpoints! 💬
- One Direction ➡️: Signals travel AWAY from soma! One-way street! 🚦
🎗️ Myelin: The Insulation!
- Myelin Sheath 🧥: Fatty coating around axon! Electrical insulation! ⚡
- Speed Boost 🚀: Makes signals travel FASTER! Up to 100x faster! ⚡💨
- White Matter 🤍: Myelinated axons look white! Grey matter = cell bodies! 🧠
- Multiple Sclerosis 😞: Disease where myelin breaks down! Signals slow/fail! 🐌
🔗 Nodes of Ranvier
- Gaps in Myelin ➖: Unmyelinated sections between myelin! Regular intervals! 📏
- Saltatory Conduction 🦘: Signal "jumps" from node to node! Super fast! ⚡
- Energy Efficient 💚: Only nodes need to regenerate signal! Saves energy! 🔋
🌳 Dendrites: The Receivers!
- Branching Structure 🌲: Tree-like extensions from soma! Receive signals! 📡
- Dendritic Spines 🌵: Small protrusions! Increase surface area! More connections! 🔗
- Input Zones 📥: Where other neurons connect! Thousands of inputs possible! 📊
- Plasticity 🧘: Can grow and change with learning! Structural flexibility! 💪
🧱 Cell Membrane
- Phospholipid Bilayer 🥪: Two layers of fat molecules! Selective barrier! 🚧
- Proteins Embedded 🔌: Ion channels and receptors! Gateway controllers! 🚪
- Selective Permeability 🔐: Controls what enters/exits! Maintains internal environment! ⚖️
🔑 Key Takeaways
- Soma contains nucleus and ribosomes - command center! 🏢🧬
- Axons transmit signals away from soma! ➡️⚡
- Myelin speeds up transmission dramatically! 🚀🎗️
- Nodes of Ranvier enable saltatory conduction! 🦘⚡
- Dendrites receive incoming signals! 🌳📡
- Cell membrane controls molecular traffic! 🧱🚧