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Nervous System: Unit Review and Quiz
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Unit Review
Here is what we have learned from this unit:
- The nervous system is the major controlling, regulatory,
and communicating system in the body. It is the center of
all mental activity including thought, learning, and memory.
- The various activities of the nervous system can be grouped
together as three general, overlapping functions: sensory,
integrative, and motor.
- Neurons are the nerve cells that transmit impulses. Supporting
cells are neuroglia.
- The three components of a neuron are a cell body or soma,
one or more afferent processes called dendrites, and a single
efferent process called an axon.
- The central nervous system consists of the brain and spinal
cord. Cranial nerves, spinal nerves, and ganglia make up
the peripheral nervous system.
- The afferent division of the peripheral nervous system
carries impulses to the CNS; the efferent division carries
impulses away from the CNS.
- There are three layers of meninges around the brain and
spinal cord. The outer layer is dura mater, the middle layer
is arachnoid, and the innermost layer is pia mater.
- The spinal cord functions as a conduction pathway and
as a reflex center. Sensory impulses travel to the brain
on ascending tracts in the cord. Motor impulses travel on
descending tracts.
Quiz
To test how much you have learned from this unit, two types
of quizzes have been created. The first type is a multiple-choice
quiz. The quiz questions are grouped into several sets of
two questions each to reduce the size of the content on each
page. When you finish the questions in one set, click the
Next button (a right-pointing arrow icon located in the Title
Bar) to proceed to the next page.
The second type is a drag-and-drop quiz, in which, by using
the mouse pointer, you drag a textual or graphic element to
a target area to show your knowledge of the material covered
in the unit. Note that the object you are dragging will snap
back to its original position until it is placed in the correct
target area. Try to drag the object as close to the center
of the target area as possible so that the object will snap
to the target area when you chose a correct answer.
Please click here to
take the multiple-choice quiz.
Please click here to
take the drag-and-drop quiz.
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