Phys ch 10

vison hearing taste smell and equilibrium

Touch temp pain itch and proprioception

• Chemoreceptors: chemicals
• Mechanoreceptors: mechanical
• Thermoreceptors: Temp
• Photoreceptors: Light. Rods dim cones bright

is the only one that is not first routed to the thalamus

the level of stimulus intensity necessary for us to be aware of a particular sensation

Enhances the contrast between the center of the receptive field and the edges of the field

the brain uses input from multiple receptors to calculate location and timing of a stimulus

the sensory neuron fires action potentials as long as the receptor potential (as long as there is stimulus) is above threshold

Respond to a change in stimulus intensity and are rapidly adoptive receptors

Free nerve endings that respond to chemical mechanical or thermal stimuli that are preceived as pain or itch

Acute, Is transmitted rapidly by small myelinated A delta fibers

is carried on small unmediated fibers

From internal organs occurs when primary sensory neurons converge onto a single ascending tract

Ia a pathological pain also known as neuropathic pain

Sweet sour salty bitter and umami

Non neural cells with membrane protiens that interact with taste ligands

Is our perception of energy carried by sound waves

Of the inner ear contains three parallel fluid filled ducts

contains the organ of cortu which contains hair cells receptors

Tympanic membrane, malleus, incus, stapes, oval window, perilymph and endolymph

Mediated through hair cells in the vestibular apparatus and semicirclar canals of the inner ear

is the translation of reflected light into a mental image

Transduce light energy into an electrcal signal that passes to the visual cortex for processing

Contracts or relaxes of the lens shape

Cornea, lens, rods, optic disk, optic chiasm, lateral geniculate body of the thalamus and visceral cortex of the optic lobe