5 senses

The 5 senses

Sight, hearing, touch, smell, taste

Reflex

an involuntary response to a stimulus

Hearing

the vibration of sound waves on the eardrums turned into a stimulus

Ossicals

3 small bones in the middle ear transfers vibrtions to cochlea

Cochlea

a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses

Auditory Nerve

the nerve that carries impulses from the inner ear to the brain, resulting in the perception of sound

Step 1 of hearing

Outer ear catches sound waves and funnels it to the eardrum

Step 2 of hearing

Middle ear- Eardrum Vibrates

Step 3 of hearing

Vibrating Eardrum causes ossicles to vibrate

Step 4 of hearing

Ossicles vibrate cochlea

Step 5 of hearing

Hairs in the cochlea convert the vibrations into impulses that are sent to the brain through the auditory nerve.

Sight

The act of seeing and perceiving images, allows us to see sizes, shapes, motion, color

Pupils

the opening in the iris of the eye

Iris

Colored part of the eye

Cornea

where light enters the eye

Retina

the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information

Optical Nerve

transmits info from the eye to the brain

Rods

Retinal receptors that detect black, white, and gray

Cones

retinal receptor cells detect fine detail and give color vision.

Touch

When sensory receptors on the skin are stimulated.

3 types of touch receptors

Mechanoreceptors, thermoreceptors, pain receptors.

Mechanoreceptor

Pressure, texture, vibrations

Thermoreceptors

detect changes in temperature

Pain receptors

pain, danger

Taste

the sensation of flavor perceived in the mouth on contact with a chemical.

Types of flavor

Salty, Sweet, Sour, Bitter, Umami/Savory

Papillae

taste buds

Capsaicin

chemical that stimulates receptors that respond to painful heat

Smell

Perceiving odors

Olfactory Cells

receptor neurons of the nose

Olfactory Nerve