Sensory System Unit

The pathway of light goes through these parts of the eye in order:

1) Cornea 2) Aqueous humor 3) Pupil 4) Lens 5) Vitreous humor

Outer Ear includes:

1) Pinna, auditory canal, tympanic membrane

Layers of the Eye include:

1) Sclera 2) Choroid coat 3) Retina

Inner Ear includes:

1) cochlea 2) semicircular canals

Middle Ear includes:

1) ossicles 2) eustachian tube

The four basic tastes and their regions of the tongue are:

1) sweet 2) salty 3) sour 4) bitter

How much information about a person's surroundings reaches the brain through the eyes?

90%

Which of these conditions are contagious?

All of the above

What is the name of the mucous membrane that lines the eyelids and covers the front of the eye?

Conjunctiva

What part of the ear allows air to enter to help equalize pressure on both sides of the tympanic membrane?

Eustachian tube

Vision, hearing, smell, taste, and touch are part of the integumentary system.

False

What part of the ear is the most complex?

Inner Ear

What is the name of the visible part of the outer ear?

Pinna

What is the function of the sensory system?

Receive stimuli to allow the body to react to changes

In which part of the eye are cones and rods located?

Retina

What part of the ear helps to maintain balance?

Semicircular canals in the inner ear

Which type of hearing loss results from damage to the inner ear or auditory nerve and usually cannot be corrected?

Sensory hearing loss

tympanic membrane

Sound waves are collected and channeled through the canal, or the eardrum

What is the treatment for cataracts?

Surgical replacement of the lens of the eye

Taste and the Tongue

Taste is one of the five special senses. The tongue is the organ that controls this sense. It is a mass of muscle tissue that contains projections called papillae, which contain "taste buds."

cilia

They are nerve cells covered with tiny hairs

Ossicles

They are small bones and they receive sound from the vibrations of the tympanic membrane and in turn transmit the sound waves to the inner ear.

semicircular canals

They contain fluid and delicate, hair-like cells that bend when the liquid moves with head and body movements. These impulses are sent to the cerebellum to help maintain balance.

What is the purpose of the wax secreted by glands in the auditory canal?

To protect the ear

What part of the ear is also known as the eardrum?

Tympanic membrane

What causes a common cold?

Virus

Conjunctiva

a mucous membrane, lines the eyelids and covers the front of the eye to provide added protection and moisture

Which of these parts of the eye help to refract light rays to focus them on the retina?

all of the above

Auditory canal

also known as the external auditory meatus which contains special glands that secrete wax to protect the ear.

treatment of Otitis media include:

antibiotics and possibly inserting tubes to relieve the pressure and fluid in the ear.

General Senses

are involved in feeling touch, temperature, pressure, and pain.

Rods

are used for vision in the dark or dim light.

Olfactory receptors

at the top of the nasal cavity make the sense of smell possible

The cells that sense color and are mainly used for vision in bright light are _______.

cones

Eustachian tube

connects the middle ear to the pharynx, or throat.

lacrimal glands

constantly clean the eye and keep it moist.

Choroid coat

contains many blood vessels that nourish the eyes.

Retina

contains many layers of nerve cells that transmit the impulses from the light rays to the optic nerve.

Each general sense receptor is capable of perceiving many types of feelings.

false

The sense of taste is more sensitive than the sense of smell.

false

lens

is a clear, circular structure located behind the pupil. It refracts, or bends, the light rays so they focus on the retina.

aqueous humor

is a clear, watery fluid that fills the space between the cornea and the iris.

Cataract

is a condition where the lens of the eye gradually becomes cloudy, which causes blurred or partial vision.

cold

is a respiratory infection.

The middle ear

is a small chamber in the temporal bone

Conjunctivitis

is also called "pink eye." It is an inflammation of the eyelid caused by a bacteria or virus, and it is extremely infectious.

Otitis media

is an infection of the middle ear caused by a bacteria or virus.

Sclera

is made of tough connective tissue and is often referred to as the "white" of the eye

Vision

is one of the five special senses

Sense of Smell

is one of the five special senses, the nose is the organ that controls this sense

Hearing

is one of the five special senses. The ear is the organ that controls this sense as well as the sense of balance

iris

is the colored portion of the eye, located behind the cornea on the front of the choroid coat.

vitreous humor

is the jellylike substance that fills the area behind the lens.

inner ear

is the most complex section of the ear

pupil

is the opening in the center of the iris.

The Eye

is the organ that controls this sense

Conductive hearing loss

occurs when sound waves are not carried to the inner ear

Sensory hearing loss

occurs when the inner ear or auditory nerve is damaged.

The nerve cells that receive stimuli for the sense of smell are _______ receptors.

olfactory

Pinna

or Auricle, is the visible part of the outer ear.

Hearing loss

or deafness has two classifications, conductive or sensory.

symptoms of Otitis media include:

pressure or pain in the ear and fever.

sensory system

refers to the special senses associated with vision, hearing, smell, taste, and touch

treatment of a cold include:

rest and medications to relieve symptoms.

The cells that are used for vision in the dark or dim light are _______.

rods

taste buds

send a signal to the brain to detect the flavor of the food.

Cones

sense color and are mainly used for vision in bright light

symptoms of a cold include:

sneezing, runny nose, sore throat, congestion, and cough.

Diseases and Disorders of the Ear

symptoms: pressure or pain in the ear and fever. treatment: antibiotics and possibly inserting tubes to relieve the pressure and fluid in the ear.

Diseases and Disorders of the Eye

symptoms: reddening of the eyelids and sclera. Treatment: involves antibiotics

Diseases and Disorders of the Nose

symptoms: sneezing, runny nose, sore throat, congestion, and cough. treatment: rest and medications to relieve symptoms.

Bitter

tastes at the back.

Sour

tastes at the sides.

Sweet

tastes at the tip.

Salty

tastes near the tip.

Tears clean the eye and keep it moist.

true

Two muscles in the iris control the size of the pupil and how much light enters the eye.

true

Cochlea

which is shaped like a snail shell. Inside the cochlea, delicate, hair-like cells make up the organ of Corti. The cells pick up sound waves and pass them on to the auditory nerve, which sends the impulse to the brain to be interpreted.