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Multiple Choice Quiz
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1

Parkinson's disease is caused by loss of function of the basal ganglia. Which of the following symptoms is not associated with Parkinson's disease?
A)Resting tremor
B)Facial rigidity
C)Difficulty initiating movement
D)Difficulty changing from one kind of movement to another
E)Flaccid paralysis
2

Stretch reflexes
A)occur only in the legs.
B)are important for maintaining erect posture.
C)mediate flexor withdrawal from a painful stimulus.
D)are initiated by stimulation of Golgi tendon organs.
E)are described by all of the above.
3

Intrafusal muscle fibers
A)are found in muscle spindles.
B)are innervated by alpha motor neurons.
C)generate most of the tension in a skeletal muscle.
D)A and B.
E)A and C.
4

The fibers in a muscle spindle
A)are not true muscle fibers because they cannot contract.
B)are innervated by gamma motor neurons.
C)function to maintain tension on spindle receptors.
D)B and C.
E)A, B and C.
5

The contraction of intrafusal muscle fibers
A)shortens the muscle spindle.
B)is important for the detection of extrafusal muscle relaxation.
C)is stimulated by gamma motor neuron activation.
D)A and B.
E)A and C.
6

Stimulation of a Golgi tendon organ causes a reflex contraction of the muscle whose tension the receptor is monitoring.
A)True
B)False
7

The activity of alpha motor neurons innervating an extensor muscle can be inhibited by activation of the Golgi tendon organs near the muscle.
A)True
B)False
8

When a person steps on a tack with their left foot, flexor muscles on the right leg and extensor muscles on the left leg will be stimulated to contract.
A)True
B)False
9

The skeletal muscles of the body are represented in the primary motor cortex proportionately to their size.
A)True
B)False
10

In the primary motor cortex, representation of the left half of the body is primarily on the right side of the brain.
A)True
B)False





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