Exam 6: The Peripheral Nervous System: Afferent Division Special Senses

Prostaglandins suppress the sensitivity of nociceptors.

The sclera is the most external layer of the eye and the choroid is the most internal layer of the eye.

Indicate the characteristics associated with each part of the ear using the answer code below: a.external ear b.middle ear c.cochlea d.semicircular canal e.utricle and saccule f.external ear and middle ear g.cochlea, semicircular canal, utricle and saccule h.semicircular canal, utricle and saccule i.cochlea and semicircular canal -Components aligned in three different planes

Match the receptor below to its function. a.tonic receptor b.phasic receptor c.specialized receptor ending of afferent neuron d.separate cell serving as a receptor -Provides continuous information about the stimuli being monitored

____________________ discrimination, the ability to distinguish different sound frequencies, depends on the region of the basilar membrane that vibrates.

Photoreceptors are depolarized in the absence of stimulation (i.e., in the dark) and hyperpolarized when stimulated (i.e., when exposed to light).

Fluid movement in the cochlea causes

The greatest density of rods is found in the fovea of the macula lutea.

Taste

In somatosensory pathways, first-order neurons usually synapse with second-order neurons in the

Which one of the following is not involved in sending the vibrational signal to the inner ear?

Mechanical deformation of the hairs of hair cells in the inner ear always results in depolarization of the hair cell synaptic terminal.

Pain may be elicited by thermal or chemical stimuli.

Indicate the properties associated with each type of nociceptor by using the answer code below: a.mechanical nociceptor b.thermal nociceptor c.polymodal nociceptor d.mechanical nociceptor and thermal nociceptor -Responds to temperature extremes

Hearing aids are more beneficial in conductive deafness than in sensorineural deafness.

Match the following eye disorder with its description. a.color blindness b.night blindness c.glaucoma d.hyperopia e.diplopia f.presbyopia g.myopia h.cataract i.astigmatism -Stiffened lens

Match the following eye disorder with its description. a.color blindness b.night blindness c.glaucoma d.hyperopia e.diplopia f.presbyopia g.myopia h.cataract i.astigmatism -Images from two eyes not fused within cortex

Describe the pathway by which sound waves are conducted in the outer, middle, and inner ear, and also how sound is transduced into neural stimuli.Include the following in your answer: cochlea, scala tympani, scala vestibule, scala media, organ of Corti, tympanic membrane, helicotrema, ear ossicles, oval window, round window, hair cells, and cochlear nerve.

Coding of sensory information may result from

Identify the structure required for hearing: