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Bio 253 Hondros Test 2 Questions And Answers $11.49   Add to cart

Exam (elaborations)

Bio 253 Hondros Test 2 Questions And Answers

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oculomotor nerve ~ mvmt. of eyeball raising eyelid change in pupil size cervical plexus ~ phrenic nerve --skin and muscles of the neck and shoulder, diaphragm are innervated lumbosacral ~ femoral obturator sciatic pudendal --skin and muscle of lower torso and lower extremities are in...

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  • August 7, 2024
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  • Exam (elaborations)
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  • Bio 253
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Bio 253 Hondros Test 2
Questions And Answers

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

Vascula 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

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