Bio 253 Hondros Test 2 | Complete Questions and
Correct Answers with Rationales | Graded A+ |
Verified Answers
Job of Auditory (Eustachian) tube - (ANSWER)maintains equal pressure on both
sides of tympanic membrane
connects middle ear to throat
Are cranial/spinal nerves PNS or CNS? - (ANSWER)PNS
Tunic layers of Eye - (ANSWER)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? - (ANSWER)Otoliths-help with balance and equilibrium
Receptors activated by specific action - (ANSWER)Thermoreceptors
Nociceptors
Mechanoreceptors
Cranial nerves that control eye movement - (ANSWER)Oculomotor
Trochlear
Abducens
,Fovea Centralis - (ANSWER)Part of Retina that contains the highest amount of
photoreceptors
Optic Disc - (ANSWER)Optic nerve exits through here
Pt of retina the has NO photoreceptors
where blood vessels enter eye
Sound transmission in ear - (ANSWER)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? - (ANSWER)Nociceptors--Pain
Receptors controlled by being stretched or pushed on -
(ANSWER)Mechanoreceptors
ie-Bladder distention
The receptor of the nose - (ANSWER)chemoreceptors
Which structure contains tracts that carry nerve impulses to/from brain? -
(ANSWER)White matter
Endocrine glands - (ANSWER)ductless
, release hormones
hormones travel through blood to targets
lamellated corpuscles - (ANSWER)common in deeper subcut. tissues, tendons,
ligaments
detect heavy pressure
tactile corpuscles - (ANSWER)abundant in hairless portions of skin
detect light touch
microglia - (ANSWER)perform phagocytosis, eat germs, clean up cellular debris
when cells die
astrocytes - (ANSWER)deliver nutrients
help form synapses
regulate fluid in interstial
ependymal cells - (ANSWER)line ventricles
move CSF
circulate CSF in ventricle of brain and central canal of spinal cord
oligodendrocytes - (ANSWER)make up myelin sheath in CNS
Correct Answers with Rationales | Graded A+ |
Verified Answers
Job of Auditory (Eustachian) tube - (ANSWER)maintains equal pressure on both
sides of tympanic membrane
connects middle ear to throat
Are cranial/spinal nerves PNS or CNS? - (ANSWER)PNS
Tunic layers of Eye - (ANSWER)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? - (ANSWER)Otoliths-help with balance and equilibrium
Receptors activated by specific action - (ANSWER)Thermoreceptors
Nociceptors
Mechanoreceptors
Cranial nerves that control eye movement - (ANSWER)Oculomotor
Trochlear
Abducens
,Fovea Centralis - (ANSWER)Part of Retina that contains the highest amount of
photoreceptors
Optic Disc - (ANSWER)Optic nerve exits through here
Pt of retina the has NO photoreceptors
where blood vessels enter eye
Sound transmission in ear - (ANSWER)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? - (ANSWER)Nociceptors--Pain
Receptors controlled by being stretched or pushed on -
(ANSWER)Mechanoreceptors
ie-Bladder distention
The receptor of the nose - (ANSWER)chemoreceptors
Which structure contains tracts that carry nerve impulses to/from brain? -
(ANSWER)White matter
Endocrine glands - (ANSWER)ductless
, release hormones
hormones travel through blood to targets
lamellated corpuscles - (ANSWER)common in deeper subcut. tissues, tendons,
ligaments
detect heavy pressure
tactile corpuscles - (ANSWER)abundant in hairless portions of skin
detect light touch
microglia - (ANSWER)perform phagocytosis, eat germs, clean up cellular debris
when cells die
astrocytes - (ANSWER)deliver nutrients
help form synapses
regulate fluid in interstial
ependymal cells - (ANSWER)line ventricles
move CSF
circulate CSF in ventricle of brain and central canal of spinal cord
oligodendrocytes - (ANSWER)make up myelin sheath in CNS
