Nervous System Key Terms

Question 1

Reverse

The all-or-none electrical event in the neuron

Answer 1

Action Potential

Question 2

Reverse

Nerve fibers that carry messages to the CNS

Answer 2

Afferant fibers

Question 3

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portions of the nervous system that controls the visceral orgrans

Answer 3

autonomic nervous system

Question 4

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nerve fiber that conducts a nerve imulse away from the cell body

Answer 4

axon

Question 5

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portion of the brain that includes the mid brain, pons, and medulla

Answer 5

brain stem

Question 6

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Major portion of the body of a nerve cell

Answer 6

cell body

Question 7

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part of the nervous system that includes the brain and spinal cord

Answer 7

Central Nervous system

Question 8

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portion of the brain that is concerned with fine coordination of skeletal muscle

Answer 8

cerebellum

Question 9

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superior aspect of brain, contains motor cortex

Answer 9

cerebrum

Question 10

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capacity for conduction

Answer 10

conductivity

Question 11

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portion of nerve fiber that sends action potentials toward nerve cell body

Answer 11

dendrites

Question 12

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nerve fibers that carry information from the CNS to the periphery NS

Answer 12

efferent fibers

Question 13

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Graded depolarization of the post-synaptic cleft by a neurotransmitter

Answer 13

excitatory postsynaptic potentials

Question 14

Reverse

Tension receptor located within a series of muscles

Answer 14

Golgi Tendon Organs

Question 15

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the maintenance of the constant internal enviorment

Answer 15

homeostasis

Question 16

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Moves post-synaptic membrane farther from the threshhold

Answer 16

inhibitory postsynaptic potentials

Question 17

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trait of certain tissues that enable them to respond to stimuli

Answer 17

irritability

Question 18

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Perception of movement obtained from information about the position and rate of movement of th joints

Answer 18

kinesthesia

Question 19

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Associated with the voluntary control of movement

Answer 19

motor cortex

Question 20

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Somatic neuron that innervates skeletal muscle tissue

Answer 20

motor neuron

Question 21

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A motor neuron and all the muscle fibers innervated by that single motor neuron

Answer 21

motor unit

Question 22

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Muscle stretch receptor oriented parallel to skeletal muscle fibers

Answer 22

muscle spindle

Question 23

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nerve cell

Answer 23

neuron

Question 24

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Chemical messenger used my neurons to communicate with eachother

Answer 24

neurotransmitter

Question 25

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portion or ANS that releases NT

Answer 25

parasympathetic nervous system

Question 26

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portion of nervous system located outside of spinal cord and brain

Answer 26

peripheral nervous system

Question 27

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Receptors that provide information on body movements and postions

Answer 27

proprioceptors

Question 28

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When extensor muscles are contracted, reflex in flexor muscles

Answer 28

reciprocal inhibition

Question 29

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Voltage difference measured across membrane

Answer 29

resting membrane potentials

Question 30

Reverse

Form the myelin sheathe

Answer 30

Schwann cell

Question 31

Reverse

Progressive activation of neurons starting with smallest and working up to bigger ones

Answer 31

size principle

Question 32

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The additive effect of numerous inputs on a neuron

Answer 32

spatial summaton

Question 33

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Portion of ANS that release norepinephrine and epineprine from adrenal glands

Answer 33

sympathetic nervous system

Question 34

Reverse

Junctions between nerve cells

Answer 34

synapses

Question 35

Reverse

Change in membrane potential produced by the addition of 2 or more inputs

Answer 35

temproal summation

Question 36

Reverse

Sensory organ that consists of 3 semicircular canals

Answer 36

vestibular apparatus