Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:With the help of figure 12.6 on page 395 and the definitions below, label the following
diagram of a typical neuron.
axon - the long extension of a neuron
that carries nerve impulses away from myelin sheath - the fatty substance that surrounds and
the body of the cell.
axon terminals - the hair-like ends of node of Ranvier - one of the many gaps in the myelin
the axon
cell body - the cell body of the
neuron; it contains the nucleus and
other cell organelles
dendrites - the branching structure of Schwann's cells - cells that produce myelin - they are
a neuron that receives messages
|(attached to the cell body)
1.
protects some nerve fibers
sheath – impulses jump from node to node resulting in
faster transmission
nucleus - the organelle in the cell body of the neuron
that contains the genetic material of the cell
located within the myelin sheath.
©EnchantedLearning.com
Place an arrow along the diagram to indicate the direction that impulses travel long the
neuron.
2.
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