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KESM Mod 2 AP
KESM Mod 2 AP The Sensory Receptors and the Eye
Question | Answer |
---|---|
What is the purpose of the senses? | to protect by detecting changes (stimuli) in the environment |
What do sensory receptors do? | detect stimuli |
What are 3 structural types of sensory receptors? | free dendrite; end organ (modified dendrite); specialized cell (in special sense organ) |
What sensory receptor responds to chemicals? | chemoreceptors |
What sensory receptor responds to temperature? | thermoreceptors |
What sensory receptor responds to light? | photoreceptors |
What sensory receptor responds to movement? | mechanoreceptors |
True/False Vision is a special sense? | true |
True/False Hearing is a special sense? | true |
True/False Equilibrium is a special sense? | true |
True/False Taste is a special sense? | true |
True/False Smell is a special sense? | true |
True/False Touch is a general sense? | true |
True/False Pressure is a general sense? | true |
True/False Temperature is a general sense? | true |
True/False Position is a general sense? | true |
True/False Pain is a general sense? | true |
What protects the eyeball? | bony orbit, eyelid, eyelashes conjunctiva, lacrimal glands |
True/False Sclera, Choroid, and Retina are coats of the eyeball. | true |
What coat of the eye is pigmented and has blood vessels? | choroid |
What coat of the eye is a receptor layer? | retina |
The cornea is the anterior portion of the white part of which coat of the eye? | sclera |
Define refraction | bending of light rays as they pass through substances of a different density |
What are the refracting parts of the eye? | cornea, aqueous humor, lens and vitreous body |
What cells in the retina function in dim light and cannot detect color? | rods |
What cells in the retina function in bright light and can detect color | cones |
True/False Pigments in the retina are sensitive to light? | true |
What is a rod pigment in the retina? | rhodopsin |
What do the 6 extrinsic muscles do? | move each eyeball |
What are the 2 intrinsic muscle of the eye? | iris, ciliary |
Where is the iris and what does it do? | colored ring around the pupil; regulates the amount of light entering the eye |
What does the ciliary muscle do? | regulates the thickness of the lens to accommodate for near vision |
What are the 2 types of nerves that supply the eye? | sensory and motor |
What is the function of the optic nerve? | carry visual impulses from the rods and cones of the retina to the brain |
What is the function of the ophthalmic branch of the trigeminal nerve? | carry impulses of pain, touch, and temperature from the eye and surrounding parts to the brain |
What are the 3 nerves that carry motor impulses to the eyeball muscles? | oculomotor, trochlear, and abducens |