Question 1

Stimulation of a neuron that terminates in the superior region of the left postcentral gyrus would produce

Accepted Answer

A)  a sensation in the right leg.
B)  a sensation in the lips.
C)  a muscle twitch in the right leg.
D)  a muscle twitch in the lips.
E)  both sensations and muscle twitches in the right leg.F) B) and C)
G) C) and D)

Question 2

The cerebellum

Accepted Answer

A)  functions to maintain proper posture and equilibrium.
B)  receives input from the motor cortex and basal ganglia.
C)  compares intended movement to actual movement.
D)  if damaged leads to uncoordinated and jerky movements.
E)  has all of these characteristics.F) All of the above
G) D) and E)

Question 3

Which ascending tract carries the sensations for fine touch and vibration?

Accepted Answer

A)  corticobulbar
B)  corticospinal
C)  posterior (dorsal) column
D)  spinothalamic
E)  spinobulbarF) A) and B)
G) None of the above

Question 4

A reduction in sensitivity in the presence of a constant stimulus is referred to as

Accepted Answer

A)  transduction.
B)  adaptation.
C)  negation.
D)  exhaustion
E)  transformation.F) A) and C)
G) B) and E)

Question 5

Figure 15-2 The Corticospinal Pathway
Use Figure 15-2 to answer the following questions:
-What occurs in this neural pathway at label "3"?

Accepted Answer

A)  synapse
B)  communication between sensory and motor neurons
C)  amplification of motor signals
D)  decussation
E)  autonomic reflexesF) C) and D)
G) A) and B)

Question 6

The corticospinal system is often referred to as the

Accepted Answer

A)  red nucleus.
B)  reticular formation.
C)  spinothalamic tracts.
D)  pyramidal system.
E)  medullary centers.F) C) and D)
G) B) and E)

Question 7

Figure 15-1 Spinothalamic Tracts
Use Figure 15-1 to answer the following questions:
-Where in the spinal cord is the structure labeled "2" located?

Accepted Answer

A)  anterior gray horns
B)  dorsal root ganglion
C)  anterior white column
D)  anterior median fissure
E)  posterior white columnF) A) and C)
G) A) and D)

Question 8

The pyramidal system provides

Accepted Answer

A)  voluntary control over skeletal muscles.
B)  voluntary control over smooth muscles.
C)  involuntary control over skeletal muscles.
D)  involuntary control over smooth muscles.
E)  involuntary control over cardiac muscle.F) B) and D)
G) A) and B)

Question 9

Each of the following is an ascending tract in the spinal cord except the

Accepted Answer

A)  fasciculus gracilis.
B)  fasciculus cuneatus.
C)  posterior spinocerebellar.
D)  reticulospinal tract.
E)  anterior spinothalamic.F) B) and E)
G) A) and D)

Question 10

Endorphins can reduce perception of sensations initiated by

Accepted Answer

A)  nociceptors.
B)  mechanoreceptors.
C)  thermoreceptors.
D)  chemoreceptors.
E)  proprioceptors.F) C) and D)
G) A) and D)

Question 11

Axons that decussate between the pyramids of the medulla oblongata belong to the ________ tracts.

Accepted Answer

A)  anterior corticospinal
B)  lateral corticospinal
C)  vestibulospinal
D)  reticulospinal
E)  rubrospinalF) C) and D)
G) C) and E)

Question 12

Feeling pain in the left arm during a heart attack is an example of ________ pain.

Accepted Answer

A)  referred
B)  phantom
C)  cutaneous
D)  prickling
E)  adaptiveF) A) and B)
G) C) and D)

Question 13

All of the following are true of a prickling pain sensations except that they

Accepted Answer

A)  are carried by type A fibers.
B)  reach the CNS quickly.
C)  are interpreted by the pre-frontal cortex.
D)  receive conscious attention.
E)  often trigger somatic reflexes.F) B) and D)
G) A) and D)

Question 14

The conversion of the stimulus into an action potential to be interpreted by the brain is called

Accepted Answer

A)  transformation.
B)  transduction.
C)  translation.
D)  transcription.
E)  transpotential.F) A) and B)
G) C) and E)

Question 15

Tracts of the lateral and medial pathways include all of the following except ________ tracts.

Accepted Answer

A)  corticospinal
B)  tectospinal
C)  rubrospinal
D)  reticulospinal
E)  vestibulospinalF) None of the above
G) A) and E)

Question 16

Examples of sensory stimuli include

Accepted Answer

A)  touch.
B)  warmth.
C)  pain.
D)  vibration.
E)  All of the answers are correct.F) None of the above
G) A) and B)

Question 17

Which of the following kinds of information do fine-touch and light-pressure mechanoreceptors provide?

Accepted Answer

A)  location of the stimulus
B)  shape of the stimulus
C)  texture of the stimulus
D)  movement of the stimulus
E)  All of the answers are correct.F) A) and B)
G) A) and C)

Question 18

Receptors that monitor the position of joints belong to the category called

Accepted Answer

A)  nociceptors.
B)  chemoreceptors.
C)  baroreceptors.
D)  proprioceptors.
E)  thermoreceptors.F) B) and C)
G) All of the above

Question 19

In the spinothalamic pathway,the sensory neuron that synapses with a neuron in the cerebral cortex is called the ________ neuron.

Accepted Answer

A)  first-order
B)  second-order
C)  third-order
D)  fourth-order
E)  receptiveF) C) and D)
G) None of the above

Question 20

How can an understanding of the neurotransmitters important in the function of the basal nuclei contribute to an understanding the underlying cause for Parkinson's disease?

Accepted Answer

Two distinct populations of neurons exis...

Exam 15: Sensory Pathways and the Somatic Nervous System

Each of the following is an ascending tract in the spinal cord except the

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Stimulation of a neuron that terminates in the superior region of the left postcentral gyrus would produce

Correct AnswerverifiedShow Answer

Receptors that monitor the position of joints belong to the category called

Correct AnswerverifiedShow Answer

Feeling pain in the left arm during a heart attack is an example of ________ pain.

Correct AnswerverifiedShow Answer

Tracts of the lateral and medial pathways include all of the following except ________ tracts.

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In the spinothalamic pathway,the sensory neuron that synapses with a neuron in the cerebral cortex is called the ________ neuron.

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How can an understanding of the neurotransmitters important in the function of the basal nuclei contribute to an understanding the underlying cause for Parkinson's disease?

Correct AnswerverifiedTwo distinct populations of neurons exis...View AnswerShow Answer

The conversion of the stimulus into an action potential to be interpreted by the brain is called

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Endorphins can reduce perception of sensations initiated by

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A reduction in sensitivity in the presence of a constant stimulus is referred to as

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The pyramidal system provides

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The cerebellum

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The corticospinal system is often referred to as the

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Axons that decussate between the pyramids of the medulla oblongata belong to the ________ tracts.

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Examples of sensory stimuli include

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Which ascending tract carries the sensations for fine touch and vibration?

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Figure 15-1 Spinothalamic Tracts Use Figure 15-1 to answer the following questions: -Where in the spinal cord is the structure labeled "2" located?

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Which of the following kinds of information do fine-touch and light-pressure mechanoreceptors provide?

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All of the following are true of a prickling pain sensations except that they

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Figure 15-2 The Corticospinal Pathway Use Figure 15-2 to answer the following questions: -What occurs in this neural pathway at label "3"?

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Two distinct populations of neurons exis...
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