A REVIEW:SENSESA five part review, Utilize your book and outside resources to fill out your study guide!

GENERAL SENSATIONfirst

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.

THE EYEPart two

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

TASTE AND SMELLPart three

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

THE EARPart four

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

ALL SENSESPart five

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.