Nervous System Weekly Quiz

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:

Answer 9

medulla oblongata, pons, and 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 neurons results in:

Answer 16

flaccid paralysis of muscles on the SAME side of the body

Question 17

Injury or disease of upper motor neurons in the cerebral cortex causes

Answer 17

spastic paralysis of muscles on the opposite side of the body

Question 18

Anterior ventral root contains axons of motor neurons, which conduct nerve impulses from…

Answer 18

The central nervous system to effectors

Question 19

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

Answer 19

posterior root ganglion of spinal nerves

Question 20

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

Answer 20

medulla to the thalamus

Question 21

First-order sensory neurons conduct impulses from:

Answer 21

a receptor to the CNS

Question 22

Cell bodies for upper motor neurons are located in the:

Answer 22

precentral gyri of the cerebral cortex

Question 23

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

Answer 23

thalamus to the somatosensory area of the cerebral cortex.

Question 24

The parietal lobe of the brain contains:

Answer 24

Primary somatosensory cortex

Question 25

Lower motor neurons are:

Answer 25

located in the ventral horn of the spinal cord

Question 26

The lateral spinothalamic tract conveys:

Answer 26

sensory impulses regarding pain

Question 27

The medial lemniscus:

Answer 27

is located in the brainstem

Question 28

The cells in the peripheral nerves which produce myelin are the:

Answer 28

Schwann cells

Question 29

The basal ganglia consists of all of the following structures, EXCEPT:

Answer 29

Cerebellum

Question 30

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

Answer 30

are heavily myelinated fibres

Question 31

The temporal lobe of the brain contains:

Answer 31

Wernicke's area

Question 32

The cell bodies of upper motor neurons are:

Answer 32

located in the motor cortex

Question 33

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

Answer 33

unmyelinated fibres

Question 34

The frontal lobe of the brain contains:

Answer 34

Broca's area

Question 35

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

Answer 35

a spastic paralysis on the left side of the body

Question 36

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 36

Motor/Expressive aphasia

Question 37

The primary somatosensory cortex is located in the:

Answer 37

Parietal lobe

Question 38

The spinothalamic tracts convey:

Answer 38

sensory impulses regarding temperature

Question 39

The posterior column tracts convey ALL of the following, EXCEPT:

Answer 39

sensory impulses regarding pain