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Chemoreceptor

Activates the sense of smell and taste buds

Organ of Corti

rests on the basiliar membrane throughout the entire length of the cochlear duct.

Modiolus

What houses the spiral ganglion which consist of cell body's of the first sensory neuron

vesciral receptors

Located internally, often within the substance of body organs

Myopia

increase in curvature of lens, nearsightedness

Nociceptors

receptors that are responsible for pain

Special sences

smell, taste, hearing, equilibrium, and vision

Referred pain

pain from stimulation of nociceptors in deep structures felt on the surface of the body;

Convergence

movement of the two eyeballs inward so that their visual axes come together, at the object viewed.

Primary colors

Green, blue and red

Utricle and Saccule

The sence organs that function in static equilibrium

Fovea

Contains the greatest concentration of cones and is therefore the point of clearest vision in good light

Two structures of inner ear

Bony and membranous structure

Where is the endolymph

within the inner ear

Perilymph

surrounds the membranous labyrinth

Hyperopia

Eyes are shorter than normal, image focuses behind the retina. Produces fuzzy image

Astigmatism

irregularity in the curvature of the cornea lens.

Bony labyrith contains

Vestibule, cochlear duct, and the semicircular canal

How many corpuscles

4 encapsulated

Meissners corpuscle

Located in epidermis, hairless skin. light pressure, mechanical. low-frequency vibration

Krause corpuscle

mucus membrane. mechanical. low-frequency vibration, textual sensation.

Ruffini corpuscle

dermis of skin, mechanical, crude and persistent touch

Pacinian (lamellar) corpuscle

dermis of skin, joint capsules. deep pressure, mechanical, high frequency vibration stretch.

Bones of the ear

mallious, incus, stapes (mis)

Structure of receptors

Free nerve ending and encapsulated

3 types of nerve endings

Nociceptors, merkel discs, and root hair plexus

Nociceptor nerve ending

almost any anxious stimulus, temperature change, mechanical.

Merkel discs nerve ending

light pressure, mechanical

Root hair plexus nerve ending

hair movement, mechanical

Macula and otoliths

Two structures of static equilibrium

What are the 3 layers of eyeball

fibrous layer, vascular layer, inner layer

Fibrous layer of eyeball

sclara, cornea.

vascular layer of eyeball

choroid, ciliary body, iris

inner layer of eyeball

retina, optic nerve, retinal blood vessels

Presbiopia

Lens of eye loses elasticity with age

brainstem

nerve impulse foes to part of your CNS and effects your vital signs

Crista ampullaris and cupula

dynamic equilibrium depends on the function of these

Ciliary body

thick portion of your choroid

Extrinsic muscles

extrinsic, superior, inferior, medial, lateral rectus, and superior and inferior obliques

Intrinsic muscles

Iris and ciliary muscles

Part of eyes that contain nervous tissue

inner coat, or layer. Retina

Root hair plexus

muscle that moves the hair

2 types of stretch receptors

muscle spindles and golgi tendon receptors

Stretch reflex

shortens a muscle group

Rhodopsin

single photo pigment inside the rods, break down into two parts. sensitive to light

4 primary taste sensations

Sweet, sour, bitter, salty

Tongue taste

geographically your tongue does not taste on one area

Filliform

center of tongue that is used for texture sensation

opening in middle ear

external auditory meatus (covered by TM, oval window, round window, auditory (Eustachian ) tube

Sclara

white part of the eye

General and special

two types of receptors

Somatic receptors

give you sensation of pain, temp, and touch

Strabismus

crossed eyed

Stimulus detectors

Mechanorecpetors, chemoreceptors, thermoreceptors, nociceptors, photoreceptors, osmoreceptors.

Structure of receptors

free nerve endings and encapsulated endings

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