Chapter 15 Sense Organs

Question 1

Adaption

Answer 1

conditon of many sensory recepetors in which the magnitude of a receptor protential decreases over a period of time in response to a continuous stimulus

Question 2

Chemoreceptor

Answer 2

receptor that responds to chemicals, responsible for taste and smell and monitoring concentration of specific chemicals in the blood

Question 3

Cochlea

Answer 3

snail, shell like structure in the inner ear that house spiral organ (organ or Corti) which is responisble for sense of hearing

Question 4

Crista ampullaris

Answer 4

fold that servves as a sensory receptor, organ located in the ampulla of the semicircular ducts, detects head movements

Question 5

Equilibrium

Answer 5

a balance between opposing elements

Question 6

Exteroceptors

Answer 6

somatic sensory receptor located in the body surface

Question 7

Gustatory

Answer 7

refers to taste

Question 8

Labyrinth

Answer 8

bony cavites and membranes of the inner ear

Question 9

Macula

Answer 9

strip of sesnory epithelium in the utricle and saccule: provides information related to head position or acceloration

Question 10

Mechanoreceptor

Answer 10

receptors that respond to physical movement in the environment: such as sound waves, for example equilibrium and balance sensors in the ear, changes shape

Question 11

Nociceptor

Answer 11

receptor activated by intense stimuli of any type that results in tissue damage; pain receptor

Question 12

Olfactory

Answer 12

cranial nerve 1, relating to the sense of smell

Question 13

Photoreceptor

Answer 13

receptor only in the eye, responds to light stimuli if the intensity if great enough to generate of receptor potential

Question 14

Proprinoceptor

Answer 14

receptor located in the muscles, tendons, and joints; allows the body to preceive it position reletive to its surroundings

Question 15

Refraction

Answer 15

bending of a ray of light as it passes from a medium of one density to one of a different density;occurs as light passes from the eye

Question 16

Retina

Answer 16

innermost layer of the eyeball; contains rods and cones and continues posteriorly with the optic nerve

Question 17

Rhodospin

Answer 17

photopigment in rods

Question 18

Thermoreceptor

Answer 18

sensory receptor activated by heat or cold/changes is temperature

Question 19

Visceroreceptors

Answer 19

somatic sense receptor located in the viseral organs, also called interoreceptor

Question 20

Which of the following is not a general sense
touch
taste
temperature
pain

Answer 20

taste

Question 21

Thermoreceptors are NOT activated by pressure

Answer 21

.

Question 22

What structure is disk shaped nerve ending that is responsible for discerning light touch

Answer 22

Merkel disks

Question 23

What is not a proprioceptor

Answer 23

root hair plexus

Question 24

Proprioceptors

Answer 24

function in relation to movements and body position

Question 25

Olfactory epithelium consists of

Answer 25

epithelial support cells basal cells cilia

Question 26

What is NOT a primary taste sensation

Answer 26

spicy

Question 27

``` Nerve impulses responsible for the sensation of taste are carried in all of the following cranial nerves except VII VIII IX X ```

Answer 27

VIII

Question 28

``` Which of the following is structure of the inner ear incus oval window cranial nerve VII vestibule ```

Answer 28

incus

Question 29

the auditory tube connects the

Answer 29

middle ear and the nasopharynx

Question 30

The only structure of the inner ear concerned with hearing is the

Answer 30

cochlear duct

Question 31

The neuronal pathway of hearing begins at the

Answer 31

cochlear nerve

Question 32

The sense organs responsible for the sense of balance is/are located in the

Answer 32

vestibule and semicircular canals

Question 33

From superficial to deep the three layers of tissue that compose the eyeball are

Answer 33

sclera, choroid, retina

Question 34

The anterior portion of the sclera is called the

Answer 34

cornea

Question 35

What are the neurons of the retina, in the order in which they conduct impulses

Answer 35

photoreceptor neurons, bipolar neurons, ganglion neurons

Question 36

All of the axons of ganglion neurons extend back to an area of the posterior eye ball called the

Answer 36

optic disks

Question 37

Which of the following spaces contains the vitreous body

Answer 37

posterior cavity

Question 38

The white of the eye is called the

Answer 38

sclera

Question 39

The function of the lacrimal gland is to

Answer 39

secrete tears

Question 40

Accommodation of the lens for near visoin necessitates

Answer 40

increases curvature of the lens

Question 41

People who acuity is worse that 20/200 after correction are considered to be

Answer 41

legally blind

Question 42

An intrisic eye muscle is the

Answer 42

iris

Question 43

Where are the specialized mechanoreceptors of hearing and balance located

Answer 43

inner ear

Question 44

The organ of Corti is the sense organ of what sense

Answer 44

hearing

Question 45

Where are taste sensations inerpreted

Answer 45

cerebral cortex

Question 46

An eye physican is an

Answer 46

ophthalmologist

Question 47

Which of the following statements about sclera is tru

Answer 47

it is the white of the eye

Question 48

What is an encapsulated nerve ending

Answer 48

lamellar corpuscles

Question 49

The retina contains microscopic receptor cells called

Answer 49

rods and cones

Question 50

Which two involuntary muscles make up the front part of they eye

Answer 50

iris and ciliary muscles

Question 51

The external ear consists of the

Answer 51

auricle and external acoustic meatus

Question 52

Receptor response

Answer 52

responds to stimuli by converting them to nerve impulses

Question 53

Receptor potential

Answer 53

develops when an adequate stimulus acts on a receptor, when a threshold is reached an action potential in the sensory neurons axon is triggered

Question 54

Special senses

Answer 54

smell, taste, vision, hearing, and equilibrium

Question 55

Classify receptors by

Answer 55

location and what stiumlates them

Question 56

Free nerve endings are the

Answer 56

majority

Question 57

Root hair plexus

Answer 57

web like free nerve endings around hair foliciles

Question 58

Merkel disks

Answer 58

discriminative touch

Question 59

Aurcle

Answer 59

visible portion of external ear

Question 60

External auditory meatus

Answer 60

tube leading from the auricle into the temporal bone and ending at the typanic membrane (ear drum)

Question 61

Middle ear has three parts

Answer 61

Malleus (hammer), incus (anvil). stapes (stirrup)

Question 62

Opening into middle ear cavity

Answer 62

oval window, round window, opening in the auditory (eustachian) tube

Question 63

Structures of the inner ear

Answer 63

bony labyrinth, membranous labyrinth, cochlea, endolymph, perilymph

Question 64

Sclera

Answer 64

outter coat of eye, protection, has no blood vessels

Question 65

Choroid

Answer 65

middle coat, contains many blood vessels, and large amout of pigment

Question 66

extrinsic eye muscles

Answer 66

we control

Question 67

intrinsic eye mucles

Answer 67

brain controls