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55 terms

IDC Sence organs test

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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