Biology 240 – Lecture BASIC TERMINOLOGY for the HUMAN NERVOUS SYSTEM Please BRIEFLY DEFINE each of the following TERMS: 1. Neuron a. Three parts (dendrite, soma, axon) b. Ways to classify 1. Structural basis: 2. Functional basis: 2. Neuroglial cells (Names and function(s)) a. CNS Neuroglial cell types b. PNS Neuroglial cell types 3. Myelin (in general; “sheath” specifically) a. Which CNS neuroglia make it? b. Which PNS neuroglia make it? c. Saltatory conduction of an impulse 4. White matter a. Why is it “white”? b. What are “columns”? 5. Grey matter a. Why is it “grey”? b. What are “horns”? 6. Afferent (sensory) a. Origin of Somatic sensory b. Origin of Visceral sensory 7. Efferent (motor) a. Origin of Somatic motor b. Origin of Visceral motor 8. Integrative 19. Potentials a. Graded potentials (hyperpolarizing/depolarizing) (Note: these are localized only; NOT propagated) 1. Postsynaptic potential 2. Generator potential 3. Receptor potential b. Action potentials 1. M.A.P. (“MAP”) 2. N.A.P. (“NAP”) 20. Receptors – Ways to Classify a. On a STRUCTURAL basis: 1. Free endings 2. Encapsulated endings 3. Separate cells b. By LOCATION (and origin of stimulus) 1. Exteroceptors 2. Interoceptors 3. Proprioceptors c. By TYPE of STIMULUS detected (Modality) 1.Mechanoreceptors 2. Thermoreceptors 3. Nociceptors 4. Chemoreceptors 5. Photoreceptors 6. Osmoreceptors 9. Nerve 10. Ganglion (plural: Ganglia) 11. Tract 12. Nucleus 13. Plexus a. List the Major Plexuses and which Spinal Nerves contribute to each 14. Somatic 15. Visceral 16. General 17. Special 18. Briefly describe each of the four types of ion channels. ADDITIONAL TERMS: 1. Sensation 2. Perception 3. Sensory Modality 4. Seven functional categories of nerve “fibers” (axons/dendrites): a. Four sensory: GSA, SSA; GVA, SVA b. Three motor: GSE, GVE, SVE 5. Cholinergic 6. Adrenergic 7. Thoracolumbar (T1 – L2) 8. Craniosacral (III, VII, IX, X, S2, S3, S4) 9. Somatic Nervous System (SNS) 10. Autonomic Nervous System (ANS) (also known as: Visceral Nervous System) a. Sympathetic Division b. Parasympathetic Division