A. Conduction of a Nervous Impulse Reorder the following parts of a multipolar neuron in the correct order (1-8) of receiving and sending the nerve impulse. Start with the dendrites as number 1. 1. axon 2. axon hillock 3. axon terminal 4. cell body 5. dendrites 6. second neuron or effector 7. synapse 8. trigger zone B. Nervous Tissue and Diseases Using your textbook or other references, identify the nervous tissue cell(s) that is (are) involved in the following diseases: 9. Multiple sclerosis 10. Epilepsy
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Reorder the following parts of a multipolar neuron in the correct order (1–8) of receiving and sending the nerve impulse. Start with the dendrites as number 1. ____ 1. axon ____ 2. axon hillock ____ 3. axon terminal ____ 4. cell body ____ 5. dendrites ____ 6. second neuron or effector ____ 7. synapse ____ 8. trigger zone
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Nervous System Part A Nervous Tissue Learning about Nervous Tissue 1 Matching anatomy of the neuron: a Region that connects axon to the initial segment b Receives incoming impulses c Contains genetic material d Cell body e Contains vesicles with neurotransmitter chemicals f Interruption in a myelin sheath, leaving axon exposed g Process that carries "outgoing" impulses h Branching at the end of the axon i Phospholipids insulating axons of some neurons j Branch of axon, usually at a right angle to the axon k Dark staining granules in soma 1. Collateral 2. Nucleus 3. Node of Ranvier (myelin sheath gap) 4. Axon hillock 5. Terminal arborizations 6. Dendrite 7. Soma 8. Myelin 9. Terminal bouton (axon terminal) 10. Axon 11. Nissl bodies 2 Using the word bank listed above, draw a myelinated multipolar neuron and label all the parts listed.
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A nerve impulse is passed from one neuron to the next by means of a. transfer of sodium ions across the synapse. b. electrical conductivity where the two cells touch. c. neurotransmitters from the axon. d. a spark "jumps" the gap between them. An understanding of the underlying causes of Alzheimer's disease may lead to treatment with which of the following? a. serotonin b. dopamine c. acetylcholine d. cholinesterase In a neuron, an impulse follows which of the following pathways? a. dendrite, cell body, axon b. axon, cell body, dendrite c. dendrite, axon; the impulse does not pass through the cell body d. cell body, axon, dendrite
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