BearCh02-ACRQedt - Chapter 02 Neurons and Glia Answers to...

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Chapter 02 – Neurons and Glia Answers to Chapter Review Questions Page 1 of 3 Copyright © 2007. Lippincott Williams & Wilkins. Ancillary material to accompany Bear et al.: Neuroscience: Exploring the Brain, 3e Question 1: State the neuron doctrine in a single sentence. To whom is this insight credited? Answer: The neuron doctrine is the idea that the neurons are not continuous with one another but are discrete cells that communicate by contact and not by continuity. This insight is credited to Santiago Ramón y Cajal. Question 2: Which parts of a neuron are shown by a Golgi stain and are not shown by a Nissl stain? Answer: The Golgi stain shows the neuronal cell body with the dendrites and the axon. The Nissl stain shows only the cell body. Question 3: What are the three physical characteristics that distinguish axons from dendrites? Answer: The three physical characteristics that distinguish axons from dendrites are: i) The cell body usually gives rise to a single axon while many dendrites extend from the cell body. ii) The axon is of uniform diameter throughout its length while dendrites rarely extend more than 2 mm in length.
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BearCh02-ACRQedt - Chapter 02 Neurons and Glia Answers to...

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