62 terms

Veneil AP CH 13 Sensory System Review

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Receptor
Specialized area of a sensory neuron that detects a specific stimulus.
Photoreceptors detect
Light
Nociceptors detect
Pain (tissue damage)
Olfaction refers to the sense of:
Smell
Gustatory sensation is most related to
Taste
Colored part of eye that contains circular and radial muscle
Cornea
Structure attached to lens causing its shape to be changed
Sclera (ciliary muscles)
Retina
Inner layer in posterior eyeball
Contains rods and cones
Fovea Centralis; Macula lutea
Optic disc: exit of cranial nerve II
Blind spot
Cerebral lobe primarily concerned with vision
Occipital
Structures that secrete tears
Lacrimal Gland
Structures located outside eye:
Eyebrows, Eyelids, Eyelashes
Rods
Responsible for black and white vision
Layer of eyeball that supplies blood to retina
Choroid
Superior rectus muscle
Moves eyeball in its bony orbit
Structures located in posterior cavity of eyeball
Vitreous humor (gel like substance)
Optic Nerve
Cranial Nerve II
Cause of Intraocular Pressure
Head Injury
Pressure pushes optic disc forward
Sclera
Outermost layer in posterior eyeball
Forward extension becomes cornea
Site of extrinsic eye muscle attachment
Cataract
Clouding of eye lens
Malleus,incus, and stapes are called:
Ossicles
Hammer, Anvil, Stirrup
Location of semicircular canals and cochlea:
Inner Ear
Hair like receptors located in cochlea:
Organ of Corti
Tube that connects pharynx and middle ear
Eustachian (Auditory) Tube
Structures that separates outer ear from middle ear
Tympanic Membrane (eardrum)
Ossicle that sits in oval window:
Stapes
Bone conduction occurs in:
Middle Ear
Cerumen collects:
External Ear
Vestibulocochlear Nerve
Sensory Nerve
Cranial Nerve 8
Cerebral Lobe concerned with hearing:
Temporal Lobe
Condition caused by impaired drainage of aqueous humor thru canal of Schlemm that increases intraocular pressure:
Glaucoma
Rods and Cones are called:
Photoreceptors
Condition caused by unequal tension exerted by extrinsic eye muscles:
Strabismus
Lazy eye
Chocked Disc:
Bulging optic disc; papilledema
Effect of contraction and relaxation of ciliary muscle:
Changes shape of lens
Gel-like substance that gently pushes retina against the choroid and maintains shape of eyeball:
Vitreous Humor
Function of the vestibule and semicircular canals:
Maintain Balance
Refraction
Bending light rays to focus on retina
Sense of smell
Olfactory; Cranial Nerve I
Chemoreceptor
Heavy concentration of cones in this area of retina:
Fovea Centralis
Venous sinuses that drain aqueous humor:
Canals of Schlemm
Structure affected by contraction and relaxation of ciliary muscles:
Lens
Blind Spot:
Optic Disc
Condition of the eyelid not completely raised, thereby making the person appear sleepy:
Ptosis
Myopia, farsightedness, and astigmatism are:
Errors of Refraction
Lysozyme, an enzyme with antimicrobial activity, is found in:
Tears
Eustachian tube connects the pharynx (throat) with this structure:
Middle ear
Sense of hearing structures:
External, Middle, and Inner Ear
Another name for Tympanic Membrane:
Eardrum
This ossicle picks up vibrations from the tympanic membrane:
Malleus -> Incus -> Stapes
Cerumen is:
Earwax
Which of the following is most related to stapes:
Stirrup
Middle ear
Tympanic membrane
The optic nerve
Cranial Nerve II
Sensory
The occipital lobe:
Concerned with vision
The choroid
Middle layer in posterior eyeball
Highly vascular; supplies retina
Forward extension become ciliary body and iris
Tactile receptors are:
Touch receptors
The medial canthus and lateral canthus are:
Corners of eyelids
Contraction of orbicularis oculi:
Closes eye
The conjunctiva
Mucous membrane that lines inner surface of eyelid
Folds back to make white of eye
Gives bloodshot appearance of eye
Pink eye
Pupillary dilation:
Regulated by iris
Radial and circular muscle control
Equipment that is used to elicit photopupillary reflex:
Light; Pen light
Contraction of radial muscles of the iris causes:
Pupil Dilation
Pinpoint Pupils
Opiods (narcotics) constrict pupils.
Miotic agents (constrict pupils)