EXSC 224 Lecture Notes - Lecture 2: Axon Hillock, Resting Potential, Schwann Cell
Document Summary
Cell body - biosynthetic center and receptive region. Has nucleus - makes neurotransmitters (which usually secrete protein/ amino acid) Modify the proteins made in rough er. Mitochondria - lots, has rough and smooth er. Glucose - only use this for fuel (not fats) Axon hillock - cone-shaped area from which the axon arises. Generates action potential if stimulous is big enough. Microtubules and atp transports vesicles produced in cell body down the axon. Processes - extensions from the cell body (dendrites and axons) Only sensory neurons have ganglia, motor neurons don"t! Tracts are clusters of axons within cns. Dendrites - receive signals from other neurons. Receptive/input region from both sensory components or other neurons. Allow for a large surface area for which neurons can synapse onto. Graded potentials - at the synapses (between neuron to neuron) Between dendrites and incoming information into neuron. Axon - conducting region of a neuron. Generates and transmits impulses (aka. axon potentials)
