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Flashcards in Week Six: Nerves Of Steel Deck (58)
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What are the functions of the nervous system?

•Coordinates and controls body activity
•Detects and processes internal and external information and formulates appropriate

1

What is the basic unit of the nervous system?

Neurons

2

What are the three types of neurons?

Sensory (afferent)
Associative
Motor (efferent)

3

What are the parts of the neuron?

Cell body, dendrites, axon

4

What is the function of dendrites?

Carry impulses toward the cell body

5

What is the combining form for dendrites

Dendr/o

6

What are the functions of axon

Carry impulses away from the cell

7

Combining form for axon

Ax/o

8

What is a synapse

Space between two neurons or between a neuron and a receptor

9

What is the combining form for a synapse

Synaps/o and synapt/o

10

What are neurotransmitters

Chemical substances that are released into the space to allow information to be relayed

11

What are neuroglia or glial cells

Supportive cells of the nervous system

12

What is the combining form glial cells

Gli/o

13

What are the glial cells: (examples of them)

Astrocytes
Microglia
Ependymal cells
Oligodendrocytes
Schwann cells

14

What is the myelin

Protective covering over some nerve cells including parts of the spinal cord
Serves as an electrical insulator

15

What are the nodes of ranvier

Gaps

16

What gives white matter it's color

Myelin gives nerve fibers a white color

17

What gives gray matter it's color

Does not contain myelinated fibers

18

What is a nerve?

One or more bundles of impulse carrying fibers that connect CNS to other parts of the body

19

Combining forms for nerve or nerve tissue

Neur/i
Neur/o

20

What is the central nervous system is made up of

the brain and spinal cord

21

Combining form for brain

Encephal/o

22

Combining form for spinal cord

Myel/o

23

Combining form for bone marrow

Myel/o

24

What are the meninges and what are the layers

A three layered membrane that surrounds the CNS

Dura mater, arachnoid membrane, pia mater

25

What is the CSF

Cerebrospinal fluid
Clear, colorless ultrafiltrate that nourishes, cools, and cushions the CNS
(Protective fluid)

26

What is the CSF made by?

Choroid plexus that lines the ventricles of the brain

27

What is the brain

Enlarged and highly developed portion of the CNS that lies in the skull and is the main site of nervous control

28

What is the cranium

Portion of the skull that encases the brain

29

Combining form for skull

Crani/o