Chapter 9

Report
A REVIEW:
SENSES
A five part review, Utilize your book
and outside resources to fill out your
study guide!
first
GENERAL SENSATION
 Describe the difference between free and an encapsulated
nerve
 General sense organs consist of free nerve endings or encapsulated nerve
endings
 Free nerve endings are found in the skin and mucous
 Used for pain, crude tough, temperature, and itch
 Encapsulated nerve endings are:
 Meissner's corpuscles: found in the skin, used for fine touch
 Ruffini’s corpuscles: found in the skin and fingers: used for touch and pressure
 Pacinian corpuscles: found in the skin, around joints, and in mammary glands:
used for pressure and high- frequency vibration
 Describe what a Proprioceptor is
 A proprioceptor is a specialized receptor found near the point of junction between
tendons and muscles and others are found deep within the skeletal muscles
 They let you know where your limbs are in space
FINISH THE CHART
Nerve Ending
What senses are used
Location
Meisners corpuscles
fine touch and low frequency
Fingertips and lips
Ruffini’s Corpuscle
Touch and pressure
skin and subcutaneous tissue layers
pacinian corpuscle
pressure and high frequency vibration
Subcutaneous, submucous and
subserous tissues. Also found around
joints and in glands.
Part two
THE EYE
LABEL THE CHART
 In The above diagram identify the location of the rods and the cones.
 Rods and cones are sensory nerves located on the retina
 What is the difference between the rods and the cones?
 Rods: are used for black and white
 Cones: are used for color
IDENTIFY THE FUNCTION OF THE
FOLLOWING STRUCTURES
 Cornea:

The thin outer portion o f the anterior eye
 Pupil:

The opening in the doughnut shaped muscle of the eye
 Ciliary Muscle:

Contract to control the size of the pupil
 Retina

The lining of the posterior part of the eye

Contains sensory neurons; that process vision
 Iris:
 Color portion of the eye
 Optic Nerve:
 Where sensory neurons gather in the back of the eye to carry signal to the brain
 Lacrimal gland
 Gland on superior lateral portion of the eye that secretes tears
Part three
TASTE AND SMELL
TASTE
 Papillae are located on the
tongue and are used for taste
and breakdown of food.
 Filiform papilla -have NO taste
buds and are have bristles to break
down food. These are the most
common.
 Fungiform Papillae-Have SOME
taste buds and are found on the
margins of the tongue.
 Circumvallate Papillae-are the
largest taste bud but are the least
common on the tongue
What are the four primary taste sensations?
 Sweet, sour, bitter, salty
What are the two key nerves for taste?
Cranial nerve 7 (Facial Nerve)
Cranial nerve 9 (Glossopharyngeal Nerve)
SMELL
 What are olfactory receptors?
 Olfactory receptors are neurons that allow us to recognize a small
 They are extremely sensitive but easily adaptive
 Where are these receptors located?
 Receptors are located in the olfactory mucosa of nasal cavity
 Olfactory nerve impulses are associated with what part of the brain?
 The olfactory nerve sends impulses to the olfactory bulb in the brain
Part four
THE EAR
Label The specified parts of the ear
WHAT ARE THE FUNCTIONS OF THE
FOLLOWING PARTS OF THE EAT
 Auditory/Eustachian Tube:
 Connects the throat to the middle ear
 Tympanic Membrane:
 Converts sound waves to mechanical vibrations
 The Vestibular Nerve:
 Nerves from semicircular canals; tells you where you are in space
 The Organ of Corti:
 Organ for hearing, lies in snail-shaped cochlea
 Sends signals from ear to brain
Part five
ALL SENSES
FILL IN THE BLANKS
 The retina has two light receptors ____ and ______
 The__________________________ separates the inner ear from the
middle ear.
 In order to see things up close ciliary bodies of the eye must ______ and
the lens must______.
 The middle ear has three bones they are the ______, ______ and
_______
 Vibration sense is due to nerve endings called _____________
 The eye has two humors the ______humor in front of the lens and the
_______humor behind the lens.

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