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KESM Mod 2 AP

KESM Mod 2 AP The Sensory Receptors and the Eye

QuestionAnswer
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
Created by: cecmagic
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