Sensory Receptor to sensation
Respond to light; found only in the eye
What is photoreceptor
A thin layer of light-sensitive cells that make up the neural inner layer
What is the retina
Large eye cavity filled with vitreous humor
What is posterior cavity
Dull, aching pain is experiencing pain carried on
What is slow pain fibers
Which eye structure(s) secretes a thin mucous film to help keep the eyeball moist?
What is the conjunctiva
The photoreceptor cells responsible for night vision
What are rods
The sensations of pressure, touch, stretch, and temperature are know as ________ senses
What is general
Allow you to orient your body in space and to know the position of your body parts
What is proprioceptor
Drains aqueous humor from the anterior chamber
What is Canal of Schlemm
Sits over the iris and admits light into the eye
What is cornea
Taste buds send gustatory impulses to the brain through which cranial nerves?
What is facial, glossopharyngeal, or vagus nerves
Which cranial nerves are involved when you "roll your eyes"
What is trochlear, oculomotor
Process of moving the eyes so that the visual axis of each eye points toward an object and light rays fall on the corresponding spot on each retina
What is convergence
When a stimulus is continuous and the firing frequency of a nerve begins to slow, the sensation diminishes
What is adaption
Respond to factors such as pressure or stretch that change the position of a receptor
What is mechanoreceptor
Outermost layer of the eye
What is sclera
Changes shape for near and far vision
What is lens
Where are the structures for hearing found
What is the cochlea
What is the center point of the retina as seen through an opthalmoscope
What is macula lutea
The process of bending light rays
What is refraction
Drugs used to relieve pain
What are analgesics
React to various chemicals, including odor and tastes
What is chemoreceptor
A ring of colored muscle that works to adjust the diameter of the pupil
What is iris
Secretes aqueous humor
What is ciliary body
What are the 3 structures of the middles ear
What is malleus, incus, stapes
Which part of the retina produces the sharpest vision
What is the fovea centralis
The structure that transmits sound waves from the outer to the middle ear
What is the tympanic membrane
Pain originating from a deep organ that is sensed as if it is originating from the body's surface
What is referred pain
Respond to tissue damage; also known as pain receptors
What is nociceptor
Highly vascular tissue layer that supplies oxygen and nutrients to the retina and sclera
What is choroid
True or False: The intensity of pain depends on the number of fibers stimulated
What is true
Which 2 structures play a key role in the process of balance
What is vestibule and semicircular canals
The curvature of the lens of they eye changes shape to allow the eye to focus on a near object
What is accommodation
Most taste buds are located in the protrusions of the tongue called
What is papillae
Nerve fibers leave the eye at the ______
What is optic disc