Chapter 15 Neural Intergration

Question 1

the proprioceptor that can detect muscle stretch

Answer 1

muscle spindle

Question 2

the proprioceptor that detects muscle contraction

Answer 2

Golgi tendon organ

Question 3

the general term for knowing where body parts are at a given time

Answer 3

proprioception

Question 4

part of the brain where proprioceptive impulses end to facilitate equilibrium

Answer 4

cerebellum

Question 5

touch receptor located in the epidermis

Answer 5

Merkel (tactile disc)

Question 6

touch receptor found in the dermis

Answer 6

Meissner (tactile corpuscle)

Question 7

touch receptor found deep in the dermis

Answer 7

Pacinian (lamellated)

Question 8

general name for a receptor that sends an action potential when it is deformed

Answer 8

mechanoreceptor

Question 9

touch receptor located around a hair follicle

Answer 9

hair root plexus

Question 10

name a chemoreceptor found in the mouth

Answer 10

taste bud

Question 11

term used to describe the uneven distribution of receptors in the skin

Answer 11

punctate distribution

Question 12

term used to describe the phenomenon where receptors stop sending action potentials when continuously stimulated

Answer 12

adaptation

Question 13

another term for a pain receptor

Answer 13

nociceptor

Question 14

bundle of axons in the CNS

Answer 14

tract

Question 15

bundle of cell bodies in the PNS

Answer 15

ganglion

Question 16

bundle of cell bodies in the CNS

Answer 16

nucleus

Question 17

term for a bundle of axons in the PNS

Answer 17

nerve

Question 18

the color of a nucleus in the brain

Answer 18

gray

Question 19

a pathway from the receptor to the postcentral gyrus must be this type of pathway

Answer 19

sensory pathway

Question 20

the general number of neurons in a sensory pathway

Answer 20

3

Question 21

location of the first-order neuron (soma) in a sensory pathway

Answer 21

dorsal root ganglion

Question 22

shape of the first-order neuron (soma) in a sensory pathway

Answer 22

unipolar

Question 23

modalities carried by the lateral spinothalamic tract

Answer 23

pain & temperature

Question 24

modalities carried by the anterior spinothalamic tract

Answer 24

crude touch & pressure

Question 25

which of the three neurons in the spinothalamic pathway crosses over to the opposite side

Answer 25

second-order neuron

Question 26

place where the spinothalamic tract ends

Answer 26

thalamus

Question 27

tract that carries impulses that allow you to localize the exact point of touch

Answer 27

posterior columns

Question 28

location of the second-order neuron (soma) in the spinothalamic pathway

Answer 28

posterior gray horn

Question 29

tract that carries impulses for vibration and proprioception

Answer 29

posterior columns

Question 30

location of the third -order neuron (soma) in the spinothalamic pathway

Answer 30

thalamus

Question 31

location of the second-order neuron (soma) in the posterior columns pathway

Answer 31

medulla oblongata

Question 32

triangular-shaped cell in the precentral gyrus

Answer 32

pyramidal cell

Question 33

another name for the corticospinal pathway (from the precentral gyrus)

Answer 33

pyramidal cell (direct)

Question 34

number of neurons in the corticospinal pathway

Answer 34

2

Question 35

location of the lower motor neuron soma in the pyramidal pathway

Answer 35

anterior gray horn

Question 36

location of the upper motor neuron soma in the pyramidal pathway

Answer 36

precentral gyrus

Question 37

place where 85% of the axons cross over to the opposite side in the pyramidal pathway

Answer 37

decussation of pyramids (medulla)

Question 38

parts of the body that have a large representation on the motor homunculus of the precentral gyrus

Answer 38

hand face & tongue

Question 39

motor centers of the brain that control muscle tone are part of this system in the brain

Answer 39

extrapyramidal (medial and lateral pathways)

Question 40

type of paralysis seen when the lower motor neuron of the pyramidal pathway is damaged

Answer 40

flaccid

Question 41

parts of the cerebrum (part of the extrapyramidal system) that control patterns of movement

Answer 41

basal nuclei

Question 42

phenomenon where pain is felt in a different part of the body than where the pain originated

Answer 42

referred pain