Sensory System

Question 1

What do sensory receptors transmit info about

Answer 1

-type of stimulus
-location of stimulus
-intensity of stimulus

Question 2

Types of sensory receptors

Answer 2

-chemoreceptors
-mechanoreceptors
-thermoreceptors
-nociceptors
-photoreceptor

Question 3

Chemoreceptor

Answer 3

Respond to odors, tastes, chemical concentration in the body

Question 4

Mechanoreceptors

Answer 4

Detect pressure, stretch, or vibration

Question 5

Thermoreceptors

Answer 5

Detect temperature changes

Question 6

Nociceptor

Answer 6

Detect pain

Question 7

Photoreceptors

Answer 7

Detect light

Question 8

Fast pain fibers

Answer 8

Skin and mucous membrane
Sharp localized pain

Question 9

Slow pain fibers

Answer 9

Deep in body organs
Dull aching pain

Question 10

Referred pain

Answer 10

Pain that is felt on the surface of the body even though it is coming from a deep organ or even a completely different area or the body

Question 11

Sense of taste

Answer 11

Gustration
Taste buds found around the papillae on the tounge

Question 12

Cranial nerve involved in sense of taste

Answer 12

Facial nerve (VII)
Glossopharyngeal nerve (IX)
Vagus nerve (X)

Question 13

Sense of smell = olfaction

Answer 13

Lining the root of the nasal cavity
Found in the epithelial tissue that lines the roof of the nasal cavity

Question 14

Nerves involved for sense of smell

Answer 14

-olfactory nerve CNI
-olfactory cortex (temporal lobe)

Question 15

Structure of the outer ear

Answer 15

Auricle (pinna)
External auditory/acoustic mestus
Cerumen glands

Question 16

Auricle (pinna)

Answer 16

Visible part of the outer ear

Question 17

External auditory / acoustic meatus

Answer 17

The opening of the auditory canal

Question 18

Cerumen gland

Answer 18

Line the canal and produce cerumen (wax)

Question 19

Structure of the middle ear

Answer 19

Tympanic membrane(ear drum)
Malleus (hammer)
Incus (anvil)
Stapes (stirrup)
Auditory or Eustachian tube

Question 20

Tympanic membrane

Answer 20

Separates the outer ear from the middle ear
Vibrates freely in response to sound wave
Auditory bones that connect the ear drum to oval window

Question 21

Auditory or eustichian tube

Answer 21

Passageway from the middle ear to the nasopharynx to equalize pressure on both sides of the tympanic membrane

Question 22

Structures of the inner ear

Answer 22

Semicircular canals and vestibules
Cochlea

Question 23

Semicircular canals and vestibule

Answer 23

Fluid filled structures that contribute to the maintainer of equilibrium and balance

Question 24

Cochlea

Answer 24

Snail like structure
Fluid filled structure that contain structures for hearing , including the organ of corti

Question 25

Balance and equilibrium

Answer 25

Semicircular canals Vestibule

Question 26

Semicircular canals

Answer 26

Detect dynamic equilibrium- speed and direction of head movements

Question 27

Vestibule

Answer 27

Detects static equilibrium (position of the head when the body is stationary as well as moving in a straight line )

Question 28

How hearing occurs ?

Answer 28

L

Question 29

Accessory structures of the eye

Answer 29

Eyebrows Eyelashes Eyelids Conjunctiva Tarsal gland

Question 30

Tarsal glands

Answer 30

Edge of the eye (tarsal plate) Secrete oil to slow the evaporation of tears and form a seal when eyes are closed

Question 31

Conjunctiva

Answer 31

Transparent mucous membrane that lines the inner surface of the eyelid and the anterior surface of the eye ball Secretes a thin mucous film to keep eyelid moist

Question 32

Lacrimal apparatus

Answer 32

Lacrimal punctum Lacrimal glands Nasolacrimal duct

Question 33

Lacrimal punctum

Answer 33

Pores at the end of the lacrimal canal that drains tears

Question 34

Lacrimal glands

Answer 34

Found above the eye: secretes tears

Question 35

Nasolacrimal duct

Answer 35

Passageway that carries tears into the nasal cavity

Question 36

Three tissue layers of the eye

Answer 36

Fibrous outer layer Vascular middle layer Retina

Question 37

Fibrous outer layer

Answer 37

Sclera (white of the eye, contains receptors) Cornea - transparent extension of the sclera that covers the iris

Question 38

Eye muscles

Answer 38

Superior oblique Inferior oblique Superior rectus Medial rectus Lateral rectus Inferior rectus

Question 39

Which muscles rotate your eyes to the side and downward

Answer 39

Superior oblique Inferior oblique

Question 40

Which muscles move the eye up, down, medially and laterally

Answer 40

Superior rectus Medial rectus Lateral rectus Inferior rectus

Question 41

Vascular middle layer

Answer 41

Iris- (ring of muscle that adjusts the diameter of the pupil to control the amount of light entering the eye) Ciliary body- (extension of the choroid around the lens that secrets aqueous humour) Chorid- (vascular layer of tissue that supplies oxygen and nutrients to the retina and sclera)

Question 42

Retina

Answer 42

Photoreceptors (rods and cones) Macula lutea (center point of retina) Fovea centralists (sharpest visual point due to an area of high cone concentration)

Question 43

What is the optic disc of the retina?

Answer 43

The point where the nerve fibers leave the retina and converge to become the optic nerve Also where blood vessels enter and leave the eye

Question 44

Anterior cavity of the eye

Answer 44

Filled with aqueous humour Between the lens and cornea

Question 45

Lens of the eye

Answer 45

A disc of tissue that changes shape for near and far vision

Question 46

Posterior cavity

Answer 46

Filled with vitreous humour Behind the lens

Question 47

Process of vision

Answer 47

Refraction Convergence Accommodation

Question 48

Refraction

Answer 48

Bending of light rays to focus on the retina

Question 49

Convergence

Answer 49

Lining up of the visual axis of each eye toward an object

Question 50

Accommodation

Answer 50

Pupils constrict and the lens changes it curvature to focus on an object