HLSC 2400U Lecture Notes - Lecture 3: Dorsal Root Ganglion, Sensory Neuron, Stimulus Modality
Document Summary
Lecture 3: physical and electrical properties of cells in the nervous system. A neuron is specialized to send an electrical signal. Multipolar neurons vibration, temperature: also called motor neurons, process huge amounts of information, multiple dendritic extensions. Resting membrane potential: when a neuron is not transmitting information, sodium pump constantly using atp to pump na+ out and. K+ in: no net change in total distribution of ions across the 2 sides, charge on axons and neuron read -70mv (normal conditions, pumps are always working. Local potentials: local potential occurs in the dendrites of our neurons, sensory and motor neurons, dendrites of sensory modality gated channels, motor neurons neurotransmitters, synaptic potentials, synaptic ligand gated channels. Propagation of action potentials: propagation move action potential faster, 1. ) increased diameter (hose= the thicker the hose the more water being pumped out, 2. ) Insulates the flow and improves conductive speed of neurons.
