Nervous Concept Map

Topics: Nervous system, Neuron, Brain Pages: 2 (495 words) Published: January 27, 2015
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Name

Class

Date

Skills Worksheet

Concept Mapping
Using the terms and phrases provided below, complete the concept map showing the structures of the nervous system.

central nervous system

parasympathetic division

spinal cord

interneurons

peripheral nervous system

sympathetic division

motor neurons

somatic nervous system

synapses

neurons

Nervous system
consists of
is divided into

1.

which communicate
across

2.

3.
which is divided into
which consists of

which includes

4.
5.
brain

6.

autonomic
nervous system

using signal
molecules called

nerves
which contains

neurotransmitters

7.

which contain

which
link

sensory neurons

to

8.
which is divided into

9.

10.

Copyright © by Holt, Rinehart and Winston. All rights reserved.

Holt Biology

25

Nervous System

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TEACHER RESOURCE PAGE
2. Reaction times increase and coordina-

and temperature, are carried by
A fibers. Motor impulses to skeletal
muscles are also carried by A fibers.
These types of impulses relay information about the external surroundings and how the body will respond to
external stimuli. The speed with which
these impulses are carried could
reduce the incidence of injury to the
body by allowing for a quick reaction
to a stimulus.
3. Student answers will vary. Sample
answer: Two factors that influence the
speed with which an impulse is conducted are the diameter of the axon and whether or not it is myelinated. In
the absence of myelination, increasing
the diameter of the axon will increase
the speed of impulse conduction. The
large axons in the organisms are
responsible for the escape or withdrawl reflexes.

tion, judgment, and speech become
impaired.
3. Alcohol is absorbed into the blood
through the stomach and small
intestine.
4. a

Vocabulary Review
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