Ch 15 Sensory pathways and the somatic nervous system

Question 1

Sensory neurons that are always active are called ________ receptors.

Answer 1

tonic

Question 2

Your uncle was just diagnosed with a heart attack. One of his major symptoms is left arm pain. You are not surprised because you are familiar with the phenomenon of ________ pain.

Answer 2

reffered

Question 3

Sensory neurons that adapt quickly are called ________ receptors.

Answer 3

phasic

Question 4

Which motor pathway does not end in the spinal cord?

Answer 4

corticobulbar tract

Question 5

For the last few weeks, you have had an odd sensation on your upper thigh. When you touch the naked skin, it feels very strange, like you are touching your skin through layers of cloth. The surrounding area feels normal. Your doctor thinks that this may be related to spinal nerve damage related to a herniated disc. The doctor calls this change in sensation

Answer 5

paresthesia

Question 6

Which neuron delivers sensations to the CNS?

Answer 6

first order

Question 7

Mechanoreceptors that respond to changes in blood pressure are called

Answer 7

baroreceptors

Question 8

Pain is to ________ as cold is to ________.

Answer 8

nociceptors : thermoreceptors

Question 9

The descending spinal tract that crosses to the opposite side of the body within the medulla oblongata is the ________ tract.

Answer 9

lateral corticospinal

Question 10

A very large, fast-adapting tactile receptor that is composed of a single dendrite enclosed by concentric layers of collagen is a

Answer 10

lateral corpuscle

Question 11

Central adaptation refers to

Answer 11

inhibition of nuclei located along a sensory pathway

Question 12

The spinal tract that relays information concerning crude touch and pressure to the CNS is the

Answer 12

anterior spinothalamic

Question 13

________ are receptors in the aorta that monitor the blood pressure.

Answer 13

baroreceptors

Question 14

Activity of neurons in the spinothalamic pathway may still send signals even if the first order sensory receptor does not receive a signal such as in amputation. This situation might cause

Answer 14

phantom limb pain

Question 15

Your brain is not constantly bombarded with signals telling it that you are wearing socks. This is because the touch receptors around your ankle are

Answer 15

phasic receptors and fast adapting

Question 16

Receptors that monitor the position of joints belong to the category called

Answer 16

proprioceptors

Question 17

A reduction in sensitivity in the presence of a constant stimulus is referred to as

Answer 17

adaptation

Question 18

Bladder fullness is to ________ as blood pH is to ________.

Answer 18

baroreceptors : chemoreceptors

Question 19

A tactile receptor composed of highly coiled dendrites that are surrounded by modified Schwann cells and a fibrous capsule is a

Answer 19

tactile corpuscle

Question 20

Damage to the tectospinal tracts would interfere with the ability to

Answer 20

make reflex responses of the head and neck in response to sudden movement and loud noises

Question 21

Some neurons within the basal nuclei are known to

Answer 21

inhibit neurons with GABA and and stimulate neurons with acetylcholine

Question 22

Thalamic neurons that project to the primary sensory cortex are ________ neurons.

Answer 22

third order

Question 23

Chemoreceptors of the general senses do not send information to the primary sensory cortex but instead send information to the ________ to control autonomic function.

Answer 23

brain stem

Question 24

free nerve endings

Answer 24

pain and temp

Question 25

tactile corpuscle

Answer 25

touch, light pressure

Question 26

bulbous corpuscle

Answer 26

deep continuous pressure

Question 27

hair follicle receptor

Answer 27

hair movement light touch

Question 28

lamellar corpuscle

Answer 28

deep pressure

Question 29

Sensory receptors can be classified according to their source of stimulus. __________ are found close to the body surface and react to stimuli in the external environment.

Answer 29

Exteroceptors

Question 30

General sensory receptors are widely distributed throughout the body and respond to, among other things, touch, pain, stretch, and changes in position.

Answer 30

True

Question 31

Tactile corpuscles respond to light touch. Where would you expect to find tactile corpuscles?

Answer 31

in the dermal papillae of hairless skin

Question 32

Lamellar corpuscles respond to __________.

Answer 32

deep pressure and vibrations

Question 33

When a stimulus is applied for a prolonged period, the rate of receptor discharge slows, and conscious awareness of the stimulus declines. This phenomenon is known as __________.

Answer 33

adaptation

Question 34

Pain is always perceived in the same area of the body that is receiving the stimulus.

Answer 34

false

Question 35

What type of sensory receptors respond to the extreme cold associated with “brain freeze”?

Answer 35

nociceptors

Question 36

General sensory receptors respond to many stimuli, including ________

Answer 36

touch

Question 37

Interoceptors are located ________.

Answer 37

in internal visceral organs

Question 38

Where are cutaneous receptors located?

Answer 38

in the skin
(dermis)

Question 39

Lamellar corpuscles are an example of ________.

Answer 39

an elaborate encapsulated nerve ending

Question 40

This receptor for light touch is made up of a free nerve ending associated with a special epidermal cell.

Answer 40

tactile (Merkel) disc

Question 41

Referred pain is ________.

Answer 41

pain perceived as arising in one area when a different area is receiving the painful stimulus

Question 42

brain freeze is an example of what

Answer 42

referred pain

Question 43

A golgi tendon organ is an example of a(n) ________.

Answer 43

proprioceptor

Question 44

Stimulus to the muscle spindle elicits the ________ reflex.

Answer 44

stretch

Question 45

Tactile corpuscles and tactile (Merkel) discs are located ________

Answer 45

in the skin

Question 46

Which of the following is a receptor for light touch?

Answer 46

hair follicle receptor

Question 47

Adaptation is a common property of general sensory receptors. Some receptors, however, do not adapt. Which type of receptor below does not adapt?

Answer 47

pain receptors

Question 48

Where does referred pain appear when the gastric juice from the stomach refluxes into the esophagus?

Answer 48

in the region of the heart

Question 49

A map of the sensory receptors for touch, heat, cold, and pain shows that they are not evenly distributed throughout the body

Answer 49

true