Exam (elaborations)
Hondros Bio 253 exam Questions with 100% correct verified answers 2024 Updated
- Course
- Institution
Hondros Bio 253 exam Questions with 100% correct verified answers 2024 Updated
[Show more]
Content preview
Hondros Bio 253 exam Questions with 100% correctverified answers 2024 Updated
Job of Auditory (Eustachian) tube - ANSWERmaintains equal pressure on both sides of
tympanic membrane
connects middle ear to throat
Are cranial/spinal nerves PNS or CNS? - ANSWERPNS
Tunic layers of Eye - ANSWERFibrous outer layer-sclera and cornea
Vascula middle layer-pigmented, cont. blood vessels
Nervous inner layer-retina, rods and cones
What are the ear stones? - ANSWEROtoliths-help with balance and equilibrium
Receptors activated by specific action - ANSWERThermoreceptors
Nociceptors
Mechanoreceptors
Cranial nerves that control eye movement - ANSWEROculomotor
Trochlear
Abducens
Fovea Centralis - ANSWERPart of Retina that contains the highest amount of
photoreceptors
Optic Disc - ANSWEROptic nerve exits through here
Pt of retina the has NO photoreceptors
where blood vessels enter eye
Sound transmission in ear - ANSWERPinna (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? - ANSWERNociceptors--Pain
Receptors controlled by being stretched or pushed on - ANSWERMechanoreceptors
ie-Bladder distention
The receptor of the nose - ANSWERchemoreceptors
, Which structure contains tracts that carry nerve impulses to/from brain? -
ANSWERWhite matter
Endocrine glands - ANSWERductless
release hormones
hormones travel through blood to targets
lamellated corpuscles - ANSWERcommon in deeper subcut. tissues, tendons,
ligaments
detect heavy pressure
tactile corpuscles - ANSWERabundant in hairless portions of skin
detect light touch
microglia - ANSWERperform phagocytosis, eat germs, clean up cellular debris when
cells die
astrocytes - ANSWERdeliver nutrients
help form synapses
regulate fluid in interstial
ependymal cells - ANSWERline ventricles
move CSF
circulate CSF in ventricle of brain and central canal of spinal cord
oligodendrocytes - ANSWERmake up myelin sheath in CNS
schwann cells - ANSWERmake up myelin sheath in PNS
depolarization - ANSWERNa+ channels open and Na+ moves inside cell
inside the cell becomes more positive
repolarization - ANSWERK+ moves out of cell
goes back to normal state
inside cell becomes more negative
ventral roots of spinal cord - ANSWERmotor neurons
multipolar
dorsal roots of spinal cord - ANSWERunipolar
sensory neurons
Nerves of the PNS - ANSWER12 Cranial nerves
31 Spinal nerves
Afferent-nerve impulse toward CNS
Efferent-nerve impulse away from CNS
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Americannursingaassociation. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80796 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now