PNUR 101 FINAL EXAM (Sensory system)
define stimulus and sensation - ANS-Stimulus - anything causing a response
describe 4 sensory receptors associated with general sensation - ANS-Sensation -
awareness of a stimulus
Thermoreceptors - hot and cold
Nociceptors - pain, all over body
Chemoreceptors - chemicals
Mechanoreceptors - pressure, compression, bending stretching, touch, balance
what is proprioception? where receptors found? - ANS-Ability to judge our body position
and location of body parts in relation to each other. Receptors are found in joints,
muscles, tendons.
describe the following structure and their function: eyebrows, eyelids, cornea, lacrimal
gland, and extrinsic eye muscles. - ANS-Eyebrows - shade eye and prevent perspiration
from running into eye
Eyelids - protect eyes from foreign material entering
Cornea - bends light as it enters the eye
Lacrimal gland - produce tears
Extrinsic eye muscles - move eyes voluntarily
describe the lens of the eye, how it is held in place, and how its shape is changed. -
ANS-ens shape is maintained by ciliary muscles. The shape adjusts to focus on near or
far images - ciliary muscles relax to flatten the lens (distance) and the ciliary muscles
contract to round lens (near)
list the structures light passed through as it moves through the eye - ANS-Cornea-
aqueous humor - pupil - lens - vitreous humor - retina
describe the relationship between tympanic membrane, the ear ossicles, and the oval
window of the inner ear. - ANS-sound wave push tympanic membrane which causes
movement of ossicles. Ossicles push on the oval window which produces waves in the
fluid of the inner ear.
define stimulus and sensation - ANS-Stimulus - anything causing a response
describe 4 sensory receptors associated with general sensation - ANS-Sensation -
awareness of a stimulus
Thermoreceptors - hot and cold
Nociceptors - pain, all over body
Chemoreceptors - chemicals
Mechanoreceptors - pressure, compression, bending stretching, touch, balance
what is proprioception? where receptors found? - ANS-Ability to judge our body position
and location of body parts in relation to each other. Receptors are found in joints,
muscles, tendons.
describe the following structure and their function: eyebrows, eyelids, cornea, lacrimal
gland, and extrinsic eye muscles. - ANS-Eyebrows - shade eye and prevent perspiration
from running into eye
Eyelids - protect eyes from foreign material entering
Cornea - bends light as it enters the eye
Lacrimal gland - produce tears
Extrinsic eye muscles - move eyes voluntarily
describe the lens of the eye, how it is held in place, and how its shape is changed. -
ANS-ens shape is maintained by ciliary muscles. The shape adjusts to focus on near or
far images - ciliary muscles relax to flatten the lens (distance) and the ciliary muscles
contract to round lens (near)
list the structures light passed through as it moves through the eye - ANS-Cornea-
aqueous humor - pupil - lens - vitreous humor - retina
describe the relationship between tympanic membrane, the ear ossicles, and the oval
window of the inner ear. - ANS-sound wave push tympanic membrane which causes
movement of ossicles. Ossicles push on the oval window which produces waves in the
fluid of the inner ear.
