This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 2) Resting Potential – [a] condition of electirical tension (happens BEFORE neuron fires) [b] When neuron is at rest its loaded, waiting to fire, (fires fully or not at all – all or nothing ) *** Neuron charge in resting potential = -70mv o Sodium –potassium pump: active transport system that carries sodium (Na + ) out and potassium (K + in) o Hyperpolarization : interior [of neuron] becomes more negative than when it started at resting potential ✔ **difficult to fire o Hypopolarization – less negative, polarization is reduced to ✔ Axon hillock is enabled to fully depolarize and FIRE NEURON \ Synapse and Receptors: Pre-synaptic terminal : the button like end of an axon, known as collaterall, releases neurotransmitters onto another cell… also known as synaptic knob [pre-synaptic terminal] AKA synaptic knob = where axon ends and CALCIUM [Ca ++ ] release neurotransmitters...
View Full Document
- Spring '08
- efore, axon b. axon