the nervous system

Question 1

afferent nerves conduct nerve impulses from

Answer 1

receptors to the central nervous system

Question 2

the factor most affecting the rate of impulse conduction is the

Answer 2

presence or absence of a myelin sheath

Question 3

the posterior (dorsal) root ganglion is

Answer 3

where the cell bodies of sensory neurons are located

Question 4

the part of a spinal nerve that contains only efferent fibres is the

Answer 4

ventral root

Question 5

cell bodies of motor neurons to skeletal muscles are located in the

Answer 5

anterior gray horns

Question 6

fine control of body motor coordination and balance is a function of the

Answer 6

cerebellum

Question 7

paired masses of gray matter within the white matter of the cerebrum that are rich in dopamine and are involved in maintenance of muscle tone are the

Answer 7

basal ganglia

Question 8

the main relay centre for conducting information between the spinal cord and the cerebrum is the

Answer 8

thalamus

Question 9

the brain stem is made up of the (3)

Answer 9

medulla oblongata, pons, midbrain

Question 10

damage to the cerebellum would result in

Answer 10

uncoordinated movement

Question 11

the cerebral hemispheres are connected internally by the

Answer 11

corpus callosum

Question 12

the primary motor area of the cerebral cortex is located in the

Answer 12

precentral gyrus

Question 13

the primary visual area and visual association area of the cerebral cortex are both located in the

Answer 13

occipital lobe

Question 14

precise location and identification of specific sensations occurs in the

Answer 14

cerebral cortex

Question 15

receptors for pressure that are widely distributed in the subcutaneous tissue and the submucosal tissues are the

Answer 15

pacinian corpuscles

Question 16

injury to lower motor neurones results in

Answer 16

flaccid paralysis

Question 17

the cell bodies of first-order neurons in the posterior column-medial lemniscus pathway to the cortex are located in the

Answer 17

posterior root ganglia of spinal nerves

Question 18

the medial lemniscus is a projection tract of second-order neurons extending from the

Answer 18

medulla to the thalamus

Question 19

first-order sensory neurons conduct impulses from

Answer 19

a receptor to the central nervous system

Question 20

cell bodies for the upper motor neurons are located in the

Answer 20

precentral gyri of the cerebral cortex

Question 21

third-order sensory neurons in the posterior column-medial lemniscus pathway extend from the

Answer 21

thalamus to the somatosensory area of the cerebral cortex

Question 22

the parietal lobe of the brain contains (1)

Answer 22

primary somatosensory cortex

Question 23

lower motor neurons are

Answer 23

located in the ventral horn of the spinal cord

Question 24

the lateral spinothalamic tract conveys

Answer 24

sensory impulses regarding pain

Question 25

where is the medial lemniscus located

Answer 25

in the brainstem

Question 26

the corticospinal (pyramidal) tract has all of the following characteristics, except

1. where affected by a disease results in a flaccid paralysis
2. passes down the spinal cord as the lateral corticospinal tract
3. is involved in the voluntary control of muscles on the opposite side of the body
4. arises from upper motor neurons in the precentral gyrus
5. contains mainly fast conducting myelinated fibres

Answer 26

1.

Question 27

the basal ganglia consist of all of the following structures, expect:

1. putamen
2. substantia nigra
3. caudate nucleus
4. globus pallidus
5. cerebellum

Answer 27

5.

Question 28

the cells in the peripheral nerves which produce myelin are the

Answer 28

schwann cellss

Question 29

the fibres responsible for conveying discriminative touch and pressure sensations from the skin to the spinal cord are

Answer 29

heavily myelinated fibres

Question 30

the temporal lobe of the brain contains (1)

Answer 30

wernicke’s area

Question 31

the cell bodies of upper motor neurons are located where

Answer 31

in the motor cortex

Question 32

the fibres responsible for conveying pain and temperature sensations from the skin to the spinal cord are

Answer 32

unmyelinated fibres

Question 33

the frontal lobe of the brain contains (1)

Answer 33

broca’s area

Question 34

what symptom results from a lesion of the primary motor cortex on the right side of the brain

Answer 34

a spastic paralysis on the left side of the body

Question 35

if a stroke caused damage to the posterior third of the inferior frontal gyrus in the left hemisphere, what would the expected result be?

Answer 35

motor/expressive aphasia

Question 36

the primary somatosensory cortex is located in the

Answer 36

parietal lobe

Question 37

the spinothalamic tract conveys

Answer 37

sensory impulses regarding temperature

Question 38

the posterior column tracts coveys all of the following, except

1. sensory impulses regarding vibration.
2. sensory impulses regarding two-point discrimination.
3. sensory impulses regarding pain.
4. sensory impulses regarding discriminative touch.
5. sensory impulses regarding proprioception.

Answer 38

3.

Question 39

which of the following symptoms results from a lesion of the primary motor cortex on the left side of the brain?

1. a spastic paralysis on the right side of the body
2. a flaccid paralysis on the left side of the body
3. muscle rigidity on the right side of the body
4. a spastic paralysis on the left side of the body
5. a flaccid paralysis on the right side of the body

Answer 39

5.