Sensory Physiology

Question 1

Outer layer of the spinal cord

Answer 1

WHITE MATTER

Question 2

Made up of axons carrying sensory or motor information

Answer 2

WHITE MATTER

Question 3

carry sensory information from periphery to the brain

Answer 3

ascending pathway

Question 4

tracts that carry motor information from brain to periphery

Answer 4

descending pathway

Question 5

2 major sensory pathways (ascending)

Answer 5

Dorsal and spinothalamic

Question 6

carry touch, pressure, and vibration information.

Answer 6

dorsal columns

Question 7

carry pain and temperature information

Answer 7

Spinothalamic

Question 8

Located at the back

Answer 8

Dorsal columns

Question 9

Located at the anterior (front side)

Answer 9

Anterolateral (spinothalamic tract)

Question 10

2 major descending pathways

Answer 10

• Lateral corticospinal tract

- Ventro-medial tracts

Question 11

carry motor information to the limbs.

Answer 11

Lateral Corticospinal tract

Question 12

carry information to the trunk and back

Answer 12

Ventromedial tract

Question 13

crossing midline of the body from one side to the other

Answer 13

Decussate

Question 14

On the same side

Answer 14

Ipsilateral

Question 15

on opposite side

Answer 15

Contralateral

Question 16

In ____, info ascends in spinal cord ipsilateral to stimulated body part and decussates in the medulla

Answer 16

Dorsal Columns

Question 17

In _____tract, info. decussates immediately in spinal cord, then ascends contralateral to stimulated body part

Answer 17

spinothalamic

Question 18

Mechanically-gated ion channels: sense pressure by responding to physical stress

Answer 18

Mechanoreceptor

Question 19

Separate receptors for “hot” and “cold.”

Answer 19

Thermoreceptors

Question 20

sense pain by responding to sign of tissue damage

Answer 20

Nociceptors

Question 21

Fastest fiber type of axon

Answer 21

Aalpha

Question 22

only___ fiber types are important in sensation

Answer 22

abeta, agamma, and C fibers

Question 23

carry pressure and temperature sensation.

Answer 23

A-beta fiber

Question 24

fibers carry quick, stabbing, acute pain

Answer 24

Aδ

Question 25

fibers carry dull, aching pain

Answer 25

C

Question 26

2 types of eye chambers

Answer 26

Anterior chamber and aqueous

Question 27

anterior chamber filled with

Answer 27

aqueous humor

Question 28

vitreous chamber filled with

Answer 28

Vitreous Humor

Question 29

s the clear outer surface of the eye through which light enters;

Answer 29

Cornea

Question 30

white protective covering

Answer 30

Sclera

Question 31

l is the hole that lets light leave the anterior chamber and pass through the lens into vitreous chamber

Answer 31

Pupil

Question 32

control the size of the pupil and shape of the lens

Answer 32

Iris and cilliary muscle

Question 33

Lens

Answer 33

focuses and refracts light

Question 34

Process of photo-transduction takes place in the ___ by ___.

Answer 34

Takes place in the retina and done by photoreceptors

Question 35

2 types of photoreceptors

Answer 35

Cones and Rods

Question 36

Are numerous and function in low light for black and white

Answer 36

Rods

Question 37

visual pigments of rods

Answer 37

Rhodopsin

Question 38

are limited and require light fro colour and high-acuity vision

Answer 38

Cones

Question 39

Resting membrane potential of the eye

Answer 39

-40Mv

Question 40

Relative depolarization at rest means there’s tonic activation of

Answer 40

Voltage-gated Ca+2 channels

Question 41

3 layers of cells in the retina

Answer 41

Photo-receptor, bipolar cells n ganglion cells

Question 42

____ cells can only generate APs

Answer 42

Ganglion

Question 43

in ___ pathway, bipolar cells are hyperpolized by NT from photoreceptors

Answer 43

ON

Question 44

in ___ pathway, bipolar cells are depolarized by NT from photoreceptor

Answer 44

OFF