I N S I D E T H I S

I S S U E :

Smell 2

Taste 2

Hearing 2

Balance 2

Vision 3

Process of seeing 3

2 questions 3

Activated by

temperature such as hot

and cold.

Nociceptors

Activated by any type

of tissue damage, pain

receptors.

photoreceptors

Receptor only in the

eye, responds or activates

to light if the energy is

great enough to cause a

disruption.

Location– (Receptors can be

classified by their location

such as..)

Exteroceptors:

Located in the

skin, oral cavity,

eyes, ears, and nose.

Also sometimes called cutane-

ous receptors, because where

they are located.

Visceroceptors:

Located are

found internally mostly

in organs or (viscera)

and when stimulated they can

give off information about the

internal environment.

Proprioceptors

These are

special types of

Visceroceptors and

Stimulus Detected–

(These receptors can be

classified into five differ-

ent groups such as..)

Mechanoreceptors-

Activated by

mechanical stimuli some

kind of “deform” or

change in receptor.

Turning into a generation

receptor potential. Such as

sound waves, or

equilibrium.

Chemoreceptors

Activated by

chemicals. Responsible

for taste, and smell and

monitoring chemicals in

the blood.

Thermoreceptors

merkel disks These

are responsible for

mediating sensations

of light or

discriminative touch.

Meissner Corpuscle

These are large egg

shaped mechanore-

ceptors. When

”deformed “ it gives off

low vibrations.

Pacinian Corpuscles

These are large

mechanoreceptors that

when sectioned show

thick laminated connec-

tive tissue capsules.

Muscle Spindles & Golgi

tendon Organs These are

the most important stretch

receptors dealing with

muscles and tendons,

classified as propriocep-

tors.

T Y P E S , D I S T R I B U T I O N , A N D F U N C T I O N S O F

R E C E P T O R S :

S P E C I A L

P O I N T S O F

I N T E R E S T :

> Types, Distributions, and

functions of receptors

>Location

>Stimulus detected

>Structure

>Special senses:

Smell

Taste

Hearing

Balance

Vision

Process of Seeing

>Why don't deer see Hunt-

ers who wear Bright or-

ange?

>What is the difference

between "nearsighted"

and "farsighted"? How are

each of these corrected?

C R E A T E D B Y : M Y I K A T H O M P S O N

B Y ; K I M B E R L Y M A N C I L L A S , C A L L I E S C H R I T T E R , K Y R A M I L E S , J E N I F F E R

D U R A N

D O E S T H A T M A K E S E N S E ? Nov. 5 2012 Volume 1, issue 3

Sensory Receptors definition- Sense organs in the peripheral nervous

system that enable the body to spreading molecules to move through, or

permeate.

Structure (No matter how the

receptor is activated or where it is

located the third important thing is

classified as the structure such as..)

Free Nerve Endings These are

the simplest and most common

and the most spread out sensory

receptors. They are both Extero-

ceptors and Visceroceptors..

root hair plexuses These are

web like arrangements of free

nerve endings that surround hair

follicles and detect hair move-

ment.

Olfactory Pathways

Set of nerve fibers conduct-

ing impulses from olfactory

receptors to the cerebral cortex .

A dog's olfactory epithelium

considerably more densely innervated, with a hundred

times more receptors per square centimeter.

DOGS VS HUMANS

TASTE-

Taste Buds

These are sense

organs that

respond to

gustatory, or

taste, stimuli.

Mostly found on the soft

palate.

Neural Pathway The gen-

eration and propagation of

an action potential, or

nerve impulse, then trans-

mit the sensory input to

the brain.

The Sense of balance

includes three balance

systems that send signals

not only to each other but

to your brain about your

body movements.

Dynamic equilibrium is a

system in a steady state

because te forwards and

backwards motions

happen at a steady rate.

SPECIAL SENSES-

B A L A N C E -

Middle ear- Consists of the

ear canal and auricle

which gather and move

the sound to your ear

drum.

Inner ear– this is part of

the ear where the ear

drum and 3 ear bones are

located , they convert

sounds in the external ear

and fluid waves in the ear.

Outer ear– This part of the

ear had the little hairs that

when sound waves hit, it

becomes the sound that

you hear. If you lose these

hairs you will become

deaf.

Neuronal Pathways- is

this pass inside your ear

that produces the sound s

that you hear. The sounds

carry through the cochlea

and hits the nerves in your

H E A R I N G -

Hearing has three

important parts that help

you hear.

Page 2 D O E S T H A T M A K E S E N S E ?

Dogs have an

incredible

sense of smell,

that humans

don't have!

“Although humans

have a sense of

smell far less keen

than animals, some

individuals can

distinguish between

thousands of odors..

And most of us can

only identify a

several hundred.”

Olfactory receptors This

is a diagram of the recep-

tors of smelling. Olfactory

epithelium consists of

yellow-colored epithelium

support cells .

SMELL-

Middle Ear

Inner Ear

Outer Ear

Structure of the eye–

Approximately five

sixths of the eye is

protected by the bony

socket. Only a small

anterior part of the

eye is visible. There

are three layers of the

eye, the innermost

layer is the sclera the

middle layer is the

choroid, and the outer-

most layer the retina.

V I S I O N -

Page 3 V O L U M E 1 , I S S U E 3

There are two cavities separated as anterior and posterior

cavities. The anterior cavity lies right in front of the lens. The

posterior cavity contains Vitreous humor which a substance

compared like soft gelatin.

Humors–

Aqueous hu-

mor forms

from the

blood in

capillaries

(mainly in the

ciliary body)

Why don't deer see Hunters who wear Bright orange?

2 questions-

Human View Deer View

Deer have no red-sensitive cone

cells in their eyes, so they can't

tell red or orange from green and

brown. The Deer's view of the

scenes above were created with

Vischeck software which shows

the effects of color blindness.

What is the difference between "nearsighted" and "farsighted"? How are

each of these corrected?

Nearsighted is being unable to see things clearly unless they are relatively close to the eyes and farsighted is being

Unable to see things clearly especially if they are relatively close to the eyes; hyperopic. This can be corrected by eye-

glasses, contact lenses, and often LASIK or laser refractive surgery .