MODULE 4 QUIZ

Question 1

the fastest conducting of the following sensory fibers is the

-1a sensory afferents
-A(delta) pain and temperature fibers
-all fibers convey sensory signals at the same rate
-c fibers
-A(beta) afferents providing tactile information

Answer 1

1a sensory afferents

Question 2

on which body part would the 2-point discrimination threshold be shortest?

-foot
-thumb
-arm
-back
-thigh

Answer 2

thumb

Question 3

a ____ is an area innervated by fibers of the cells from a single dorsal root ganglion

-dermatome
-receptive field
-homunculus

Answer 3

dermatome

Question 4

what is an important difference between the Meissner and Pacinian receptors?

-Meissner receptors are rapidly adapting and Pacinian are slow adapting
-only Meissner receptors respond to vibrations
-Meissner receptors are located close to skin surface but Pacinian are located deep in dermis

Answer 4

Meissner receptors are located close to skin surface but Pacinian are located deep in dermis

Question 5

which of the following is/are proprioceptor(s)

-golgi tendon organs
-muscle spindles
-joint receptors

Answer 5

all

Question 6

the axons of the medial lemniscus synapse with neurons of the

-primary sensory cortex
-cuneate nucleus
-thalamus
-gracile nucleus
-dorsal root ganglion

Answer 6

thalamus

Question 7

the ____ lies in the medial dorsal column of the spinal cord and conveys information from the lower limbs; the ____ lies in the lateral dorsal column of the spinal cord and conveys information from the upper limbs, trunk, and neck

-cuneate tract, gracile tract
-trigeminal ganglia, principal nucelus
-dorsal root ganglion, trigeminal ganglia
-gracile tract, cuneate tract

Answer 7

gracile tract, cuneate tract

Question 8

which statement(s) about the primary somatosensory cortex (S1) is/are true?

-increased and specialized use of the hands and fingers would produce changes in respective regions of the somatosensory cortex
-the amount of cortex dedicated to each body part is proportional to the surface area of the body part
-functional reorganization in the brain occurs after amputation

Answer 8

-increased and specialized use of the hands and fingers would produce changes in respective regions of the somatosensory cortex
-functional reorganization in the brain occurs after amputation