Bio 253 Hondros Test 2 Graded A
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 - ductless
release hormones
hormones travel through blood to targets
lamellated corpuscles - common in deeper subcut. tissues, tendons, ligaments
detect heavy pressure
tactile corpuscles - abundant in hairless portions of skin
detect light touch
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 - ductless
release hormones
hormones travel through blood to targets
lamellated corpuscles - common in deeper subcut. tissues, tendons, ligaments
detect heavy pressure
tactile corpuscles - abundant in hairless portions of skin
detect light touch
