Bio 253 Hondros Test 2 Questions and
Answers| Latest Update
Job of Auditory (Eustachian) tube
maintains equal pressure on both sides of tympanic membrane
connects middle ear to throat
Are cranial/spinal nerves PNS or CNS?
PNS
Tunic layers of Eye
Fibrous outer layer-sclera and cornea
Vascular middle layer-pigmented, cont. blood vessels
Nervous inner layer-retina, rods and cones
What are the ear stones?
Otoliths-help with balance and equilibrium
,Receptors activated by specific action
Thermoreceptors
Nociceptors
Mechanoreceptors
Cranial nerves that control eye movement
Oculomotor
Trochlear
Abducens
Fovea Centralis
Part of Retina that contains the highest amount of photoreceptors
Optic Disc
Optic nerve exits through here
Pt of retina the has NO photoreceptors
where blood vessels enter eye
, Sound transmission in ear
Pinna (auricle)--external auditory canal--tympanic membrane (vibrates back and
forth; pushes on the ossicles)--malleolus, incus, stapes--fluid in the inner ear
becomes wavy and stimulates mechanoreceptors (hair cells) in the cochlea
Which receptors never experience adaptation?
Nociceptors--Pain
Receptors controlled by being stretched or pushed on
Mechanoreceptors
ie-Bladder distention
The receptor of the nose
chemoreceptors
Which structure contains tracts that carry nerve impulses to/from brain?
White matter
Endocrine glands
Answers| Latest Update
Job of Auditory (Eustachian) tube
maintains equal pressure on both sides of tympanic membrane
connects middle ear to throat
Are cranial/spinal nerves PNS or CNS?
PNS
Tunic layers of Eye
Fibrous outer layer-sclera and cornea
Vascular middle layer-pigmented, cont. blood vessels
Nervous inner layer-retina, rods and cones
What are the ear stones?
Otoliths-help with balance and equilibrium
,Receptors activated by specific action
Thermoreceptors
Nociceptors
Mechanoreceptors
Cranial nerves that control eye movement
Oculomotor
Trochlear
Abducens
Fovea Centralis
Part of Retina that contains the highest amount of photoreceptors
Optic Disc
Optic nerve exits through here
Pt of retina the has NO photoreceptors
where blood vessels enter eye
, Sound transmission in ear
Pinna (auricle)--external auditory canal--tympanic membrane (vibrates back and
forth; pushes on the ossicles)--malleolus, incus, stapes--fluid in the inner ear
becomes wavy and stimulates mechanoreceptors (hair cells) in the cochlea
Which receptors never experience adaptation?
Nociceptors--Pain
Receptors controlled by being stretched or pushed on
Mechanoreceptors
ie-Bladder distention
The receptor of the nose
chemoreceptors
Which structure contains tracts that carry nerve impulses to/from brain?
White matter
Endocrine glands
