Question 1

Type II cutaneous mechanoreceptors, found deep in the dermis, function as receptors for touch as well as for pressure.

Accepted Answer

A) True 
 B)False

Question 2

Select the best description for the function of the corticobulbar tract:

Accepted Answer

A)   impulses for coordination of movements of the trunk and proximal parts of the limbs
B)   impulses that move the head and eyes in response to visual stimuli
C)   conveys nerve impulses from motor cortex to skeletal muscles of head and neck to coordinate precise, voluntary movements
D)   impulses for subconscious proprioception
E)   impulses for precise voluntary movements of the hands and feet

Question 3

Which of the following is NOT a proprioceptor?

Accepted Answer

A)   hair root plexus
B)   joint kinesthetic receptor within synovial joint capsules
C)   tendon organ within tendons
D)   muscle spindle within skeletal muscles

Question 4

Decussation of sensory pathways occurs before the pathway reaches the thalamus.

Accepted Answer

A) True 
 B)False

Question 5

First-order neurons transmit signals from somatic receptors along cranial and spinal nerves into the brain stem and spinal cord respectively.

Accepted Answer

A) True 
 B)False

Question 6

The receptors for pain:

Accepted Answer

A)   are free nerve endings called nociceptors.
B)   may be stimulated by chemicals released by injured tissues.
C)   respond to any type of stimulus if it is of sufficient intensity.
D)   all of these choices

Question 7

Axons of _____-order neurons cross over to the other side in the brain or spinal cord before ascending to the thalamus.

Accepted Answer

A)   first
B)   second
C)   third
D)   upper

Question 8

Name three spinal tracts that carry conscious sensory information. For each tract, describe the location and the types of sensations transmitted.

Accepted Answer

1. Posterior column-medial lem...

Question 9

Ascending somatic sensory pathways to the cerebral cortex consist of thousands of sets of three neurons: first-order neurons, second-order neurons, and third-order neurons.

Accepted Answer

A) True 
 B)False

Question 10

_____ is defined as the conscious or subconscious awareness of changes in the external or internal conditions of the body.

Accepted Answer

A)   Sensation
B)   Adaptation
C)   Perception
D)   Reception

Question 11

What is referred pain? Using an example, explain how referred pain occurs.

Accepted Answer

Pain impulses from the viscera are often...

Question 12

Referred pain site for the liver and gallbladder

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 13

The cell bodies of _____-order sensory neurons are located in the thalamus.

Accepted Answer

A)   first
B)   second
C)   third
D)   fourth

Question 14

Incoming sensory information is integrated; that is, it is processed and interpreted and a course of action is taken. At which of the following locations does the integration process occur?

Accepted Answer

A)   spinal cord and brain stem
B)   cerebellum
C)   cerebral cortex
D)   All of these choices are correct

Question 15

Referred pain site for the kidneys

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 16

The major control region for planning and initiating voluntary movements is the primary motor area (precentral gyrus) of the cortex.

Accepted Answer

A) True 
 B)False

Question 17

From the following list of spinal cord pathways, choose the ones that are together responsible for carrying all conscious sensory information in the spinal cord:
1)  spinothalamic
2)  gracile fasciculus
3)  spinocerebellar
4)  posterior column-medial lemniscus
5)  cuneate fasciculus

Accepted Answer

A)   1,2, 4, 5
B)   2, 5
C)   3, 4
D)   1, 3

Question 18

Select the best description for the function of the lateral corticospinal tract:

Accepted Answer

A)   impulses for coordination of movements of the trunk and proximal parts of the limbs
B)   impulses that move the head and eyes in response to visual stimuli
C)   conveys nerve impulses from motor cortex to skeletal muscles of head and neck to coordinate precise, voluntary movements
D)   impulses for subconscious proprioception
E)   impulses for precise voluntary movements of the hands and feet

Question 19

Pyramidal pathways:

Accepted Answer

A)   innervate skeletal muscles only.
B)   contain upper motor neurons and lower motor neurons.
C)   extend from the cerebral cortex, through the medulla, and then to their destination, either through cranial nerves or through spinal cord tracts and spinal nerves.
D)   all of these choices

Question 20

_____ are proprioceptors located at the junction of a tendon and a muscle.

Accepted Answer

A)   Muscle spindles
B)   lamellated corpuscles (pacinian corpuscles) 
C)   Tendon organs
D)   Extrafusal fibers

Exam 20: Somatic Senses and Motor Control

Ascending somatic sensory pathways to the cerebral cortex consist of thousands of sets of three neurons: first-order neurons, second-order neurons, and third-order neurons.

Correct AnswerverifiedShow Answer

First-order neurons transmit signals from somatic receptors along cranial and spinal nerves into the brain stem and spinal cord respectively.

Correct AnswerverifiedShow Answer

Select the best description for the function of the lateral corticospinal tract:

Correct AnswerverifiedShow Answer

_____ is defined as the conscious or subconscious awareness of changes in the external or internal conditions of the body.

Correct AnswerverifiedShow Answer

Referred pain site for the kidneys

Correct AnswerverifiedShow Answer

Name three spinal tracts that carry conscious sensory information. For each tract, describe the location and the types of sensations transmitted.

Correct Answerverified1. Posterior column-medial lem...View AnswerShow Answer

What is referred pain? Using an example, explain how referred pain occurs.

Correct AnswerverifiedPain impulses from the viscera are often...View AnswerShow Answer

Which of the following is NOT a proprioceptor?

Correct AnswerverifiedShow Answer

From the following list of spinal cord pathways, choose the ones that are together responsible for carrying all conscious sensory information in the spinal cord: 1) spinothalamic 2) gracile fasciculus 3) spinocerebellar 4) posterior column-medial lemniscus 5) cuneate fasciculus

Correct AnswerverifiedShow Answer

Type II cutaneous mechanoreceptors, found deep in the dermis, function as receptors for touch as well as for pressure.

Correct AnswerverifiedShow Answer

The major control region for planning and initiating voluntary movements is the primary motor area (precentral gyrus) of the cortex.

Correct AnswerverifiedShow Answer

Decussation of sensory pathways occurs before the pathway reaches the thalamus.

Correct AnswerverifiedShow Answer

Incoming sensory information is integrated; that is, it is processed and interpreted and a course of action is taken. At which of the following locations does the integration process occur?

Correct AnswerverifiedShow Answer

Axons of _____-order neurons cross over to the other side in the brain or spinal cord before ascending to the thalamus.

Correct AnswerverifiedShow Answer

_____ are proprioceptors located at the junction of a tendon and a muscle.

Correct AnswerverifiedShow Answer

The receptors for pain:

Correct AnswerverifiedShow Answer

Select the best description for the function of the corticobulbar tract:

Correct AnswerverifiedShow Answer

Referred pain site for the liver and gallbladder

Correct AnswerverifiedShow Answer

The cell bodies of _____-order sensory neurons are located in the thalamus.

Correct AnswerverifiedShow Answer

Pyramidal pathways:

Correct AnswerverifiedShow Answer

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1. Posterior column-medial lem...
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Pain impulses from the viscera are often...
View Answer

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