X can you think of an analogy from your everyday life

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x Can you think of an analogy from your everyday life that can help you explain the absolute and relative refractory periods? 5.3.6 Propagation of an Action Potential x Describe the process of how action potentials propagate from cell to cell. o How are action potentials like a row of dominoes falling?
BIO 264 Page 4 o Why do action potentials only propagate in one direction as they travel down an axon? Hint: think about the absolute refractory period and the inactivation gate of the voltage-gated sodium channel. x What is myelin ? What are nodes of Ranvier ? What role do the following terms play in saltatory conduction ? x Why might a neuron utilize saltatory conduction? What are the advantages? Take BIO 264 Quiz 5.3
BIO 264 Page 1 Section 6.1: Study Guide Section 6.1 Objectives: 9 Explain the organization of the nervous system including the Central nervous system (CNS), Peripheral Nervous System (PNS), Autonomic Nervous System (ANS) and Enteric Nervous System. 9 Describe the process for information to be communicated between the CNS and PNS. Understand the role of the Efferent Neurons, Afferent Neurons, Control Center, Receptors, & Effectors. 9 Explain the structure of a neuron (soma, dendrites, axon, myelin, axon terminals) and the neurons unique features in lifespan, metabolic rate and mitotic ability. 9 Describe how neurons are classified by structure and function. Structural Classification: Multipolar, Bipolar, Unipolar. Functional Classification: Sensory, Motor, Interneurons. 9 Describe the neuroglia cells of the CNS and PNS (Astrocyte, Oligodendrocyte, Ependymal Cells, Microglial Cells, Satellite cells, & Schwann cells) and their form, function and relationship with Neurons. 9 Explain the process of salutatory conduction and how myelin sheaths speed up the sending of the action potentials along the axon Nodes of Ranvier. 6.1 ORGANIZATION OF THE NERVOUS SYSTEM x Compare and contrast the structure and function of Neurons and Glial Cells. x Explain the organization of the Nervous System. Draw a concept map to diagram the nervous system and add details as you go through this module. Include anatomy structures involved, functions, unique features, general effects, and relationships. You will be learning more about the Autonomic Nervous System in Module 10 and can expand your concept map more then. Be sure to include in your diagram these main concepts: o The Nervous System Central Nervous System (CNS) x Brain & Spinal Cord Peripheral Nervous System (PNS) x Sensory (or Afferent) Division - Afferent Neurons x Motor (or Efferent) Division Efferent Neurons: Somatic Nervous System
BIO 264 Page 2 Autonomic Nervous System (ANS) x Parasympathetic Nervous System x Sympathetic Nervous System Enteric Nervous System x Describe the process used for information to be communicated between the Peripheral Nervous System and the Central Nervous System. Add this relationship process to your concept map.

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