BIO 253 EXAM 2 LATEST ACTUAL EXAM 100
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES |AGRADE
Terms in this set (157)
1 sweet = stimulated by carbs
2. sour = stimulated by acids ( H+)
3. salty = stimulated by salts (N a+ o+ r)
5 primary taste sensations
4. bitter = stimulated by organic compounds Mg and Ca
salts
5. Umami = stimulated by some amino acids MSG
- primarily motor nerve
- motor impulses to one pair of muscles that move the
Abducense Nerve (VI)
eyes
- some sensory
- primarily motor nerve
- formerly called spinal accessory
contain cranial and spina brahcnes
Accessory Nerve (XI) cranial= join vagus N, motor to muscles of soft palate,
pharynx and larynx
Spinal= motor to muscles of neck and back. small
sensory component
- connects middle ear to throat
- helps maintain = pressure on both sides of tympanic
Auditory (Eustachian) Tube
membrane
- usually closed by valve- like flaps in throat
, - 3 tiny bones
- vibrate in response to tympanic membrane vibrations
Auditory Ossicles MIDDLE
amplify force
EAR
- malleus, incus and stapes
- hammer, anvil and stirrup
first part of axon contains many voltage-gated sodium
Axon Hillock/ Initial
channels. where the threshold is reached, voltage- gated
Segment/ Trigger Zone
Na+ channels open (Beginning of the action potential)
respond to changes in chemical concentrations ( taste,
Chemorceptors
smell, oxygen concentration)
- keeps fluid pressure in ventricles contant
- can lead to collapse of cerebral blood vessels injury of
Clinical Application of
brain tissue compressed against skull
Cerebrospinal Fluid
- spinal tap/ lumbar puncture is used to measure CSF
Pressure
pressure
- hydrocephalus in infant can be treated with a shunt
Cochlea INNER EAR functions in hearing
- middle compartment
Cochlear Duct COCHLEA
- portion of membranous labyrinth in cochlea
- S shaped tube
External Acoustic Meatus - lined with ceruminous glands
OUT EAR - carries sound to tympanic membrane
- terminates at tympanic membrane
- mixed nerve
- special sensory from taste receptors
Facial Nerve (VII)
- somatic motor to muscle of facial expression
- autonomic motor to tear glands, and salivary glands
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 TheAlphanurse. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
