Exam (elaborations)
BIO 253 HONDROS TEST 2- 2023 Q&A GRADED A+
- Course
- Institution
BIO 253 HONDROS TEST 2- 2023 Q&A GRADED A+
[Show more]
Seller
Follow
Content preview
BIO 253 HONDROS TEST 2 - 2023 Q&A GRADED A+ 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 porti ons 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 mov e CSF circulate CSF in ventricle of brain and central canal of spinal cord oligodendrocytes - ANSWER make up myelin sheath in CNS schwann cells - ANSWER make up myelin sheath in PNS depolarization - ANSWER Na+ channels open and Na+ moves inside cell ins ide the cell becomes more positive repolarization - ANSWER K+ moves out of cell goes back to normal state inside cell becomes more negative ventral roots of spinal cord - ANSWER motor neurons multipolar dorsal roots of spinal cord - ANSWER unipolar sensory neurons Nerves of the PNS - ANSWER 12 Cranial nerves 31 Spinal nerves Afferent -nerve impulse toward CNS Efferent -nerve impulse away from CNS function of CNS - ANSWER integrate all cell impulses from body and send out commands What does myelin sheath do? - ANSWER covers white matter speeds up nerve impulses NO myelin sheath in gray matter relative refractory - ANSWER Na+ gate channel closes --
Repolarization saltatory conduction - ANSWER nerve impulse jumps from node -to-node in myelinated nerve fiber action potential - ANSWER ion distribution at rest in a membrane
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 nursepauline. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $29.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81298 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now