Unit 2: Exteroception

Question 1

L1: Somatosensory Area ___ receives information from somatosensory Area __.

Answer 1

2; 1

Question 2

L1: The second synapse for fibers in the medial lemniscal system occurs in the _____.

Answer 2

VPL thalamus

Question 3

L1: Transducin activates a _______ to degrade _____ and close cation channels.

Answer 3

PDE; cGMP

Question 4

L2: _____-adapting fibers sense steady touch.

Answer 4

Slowly

Question 5

L2: _____-adapting fibers sense vibration.

Answer 5

Rapidly

Question 6

L2: Auditory information is relayed through the _____ in the thalamus

Answer 6

Medial Geniculate Nucleus

Question 7

L2: Brodmann’s Area 1 and 2 contain fibers that are sensitive to _______.

Answer 7

Direction and orientation

Question 8

L2: Brodmann’s Area 2 fibers are distinctive in that they are _____-sensitive.

Answer 8

Shape

Question 9

L2: Brodmann’s Area 3a contains fibers from _______.

Answer 9

Muscle stretch receptors (proprioception)

Question 10

L2: Brodmann’s Area 3b contains fibers from ______.

Answer 10

Cutaneous receptors

Question 11

L2: In long receptor cells, stimulus intensity changes the ______.

Answer 11

frequency of action potentials

Question 12

L2: In rod cells, a conformational change in 1-retinal causes ______ to be converted to _______, which activates the G protein _________.

Answer 12

Rhodopsin; metarhodopsin; Transducin

Question 13

L2: In rod cells, photons cause a conformation change in ______.

Answer 13

1-retinal

Question 14

L2: In short receptor cells, stimulus intensity changes the _______.

Answer 14

receptor potential

Question 15

L2: Layer __ of the cortex projects to other areas of the somatosensory cortex.

Answer 15

I and II

Question 16

L2: Layer __ of the cortex projects to other subcortical areas

Answer 16

V

Question 17

L2: Layer __ of the cortex projects to the thalamus.

Answer 17

VI

Question 18

L2: Layer __ of the cortex receives input from the thalamus

Answer 18

IV

Question 19

L2: Meissner’s corpuscles are ______-adapting with a ______ receptive field.

Answer 19

rapidly; small

Question 20

L2: Merkel’s disks are ______-adapting with a ______ receptive field.

Answer 20

slowly; small

Question 21

L2: Olfactory information is relayed through the _____ in the thalamus

Answer 21

Not relayed through the thalamus

Question 22

L2: Pacinian corpuscles are ______-adapting with a ______ receptive field.

Answer 22

rapidly; large

Question 23

L2: Ruffini endings are ______-adapting with a ______ receptive field.

Answer 23

slowly; large

Question 24

L2: The fibers from the trigeminal lemniscal system join fibers from the medial lemniscal system in the ______.

Answer 24

Medial lemniscus

Question 25

L2: The first synapse for fibers in the medial lemniscal system occurs in the ______.

Answer 25

caudal medulla

Question 26

L2: The first synapse for fibers in the trigeminal lemniscal system occurs in the _____.

Answer 26

Principal nucleus

Question 27

L2: The second synapse for fibers in the trigeminal lemniscal system occurs in the ______.

Answer 27

VPM thalamus

Question 28

L2: Visual information is relayed through the ______ in the thalamus

Answer 28

Lateral Geniculate Nucelus

Question 29

L2: What skin receptor is rapidly-adpating and has a large receptive field?

Answer 29

Pacinian Corpuscles

Question 30

L2: What skin receptor is rapidly-adpating and has a small receptive field?

Answer 30

Meissner's Corpuscles

Question 31

L2: What skin receptor is slowly-adpating and has a large receptive field?

Answer 31

Ruffini Endings

Question 32

L2: What skin receptor is slowly-adpating and has a small receptive field?

Answer 32

Merkel's disks

Question 33

L2: Which skin receptors are rapidly-adapting?

Answer 33

Meissner's Corpuscles, Pacinian Corpuscles

Question 34

L2: Which skin receptors are slowly-adapting?

Answer 34

Merkel's disks, Ruffini Endings

Question 35

L2: Which skin receptors have large receptive fields?

Answer 35

Pacinian Corpuscles, Ruffini Endings

Question 36

L2: Which skin receptors have small receptive fields?

Answer 36

Meissner's Corpuscles, Merkel's disks

Question 37

L2: Which types of fibers (A, C, etc.) are found in the medial lemniscal system?

Answer 37

A-alpha, A-beta

Question 38

L3: What type of sensory information is transmitted by A-alpha fibers?

Answer 38

Muscle/tendon afferent

Question 39

L3: What type of sensory information is transmitted by A-beta fibers?

Answer 39

secondary muscle afferents, skin mechanoreceptors

Question 40

L3: What type of sensory information is transmitted by A-delta fibers?

Answer 40

Sharp pain, cold temperature

Question 41

L3: What type of sensory information is transmitted by C fibers?

Answer 41

Warm temperature, burning pain, itch, crude touch