Exam (elaborations)
Ocular A&P- EOMs PP1
- Institution
- NUR 240 EXAM 2 Practice Questions.
Ocular A&P- EOMs PP1
[Show more]
Seller
Follow
Content preview
Ocular A&P- EOMs PP1As the muscular arteries continue forward, what do they turn into? - ANS-Anterior ciliary
arteries
Do the actin and/or myosin myofibrils shorten during muscle contraction? - ANS-Neither
change length
Does a muscle fiber have one nuclei? - ANS-No, it has many
Does the A band shorten with contraction? - ANS-A band does not shorten
Does the H zone shorten with contraction? - ANS-Yes
Does the I band shorten with contraction? - ANS-Yes.
How does the EOM blood supply compare to other striated muscle? - ANS-More dense
How does the EOM CT sheath compare to other striated muscle? - ANS-More delicate
How does the EOM Elastic fiber concentration compare to other striated muscle? -
ANS-Higher concentration
How does the EOM muscle contraction compare to other striated muscle? - ANS-Weak,
but very fast
How does the EOM neuron:muscle fiber ratio compare to other striated muscle? -
ANS-High, resulting in finer control (fewer fibers per neuron)
How far do the global fibers run in the EOMs? - ANS-Full length of muscle
How far do the orbital fibers run in the EOMs? - ANS-End before muscle becomes
tendon
How is actin arranged? - ANS-In a double helix with troponin and tropomysin on the
outside of the helix
How many EOMs are there per eye? - ANS-6
, What are myotendinous cylinders (palisade endings)? - ANS-Unique proprioceptive
receptors on the EOMs
What are the 2 types of orbital muscle fibers? - ANS--Singly innervated red
-Singly innervated white
What are the 4 types of global muscle fibers? - ANS--Singly innervated red
-Singly innervated intermediate
-Singly innervated white
-Multiply innervated
What are the characteristics of the multiply innervated global fibers? - ANS--Slow tonic
-Very poor fatigue resistance
What are the characteristics of the singly innervated intermediate global fibers? -
ANS--Fast twitch
-Intermediate fatigue resistance
What are the characteristics of the singly innervated red global fibers? - ANS--Fast
twitch
-Very fatigue resistant
What are the characteristics of the singly innervated red orbital fibers? - ANS--Fast
twitch
-Fatigue resistant.
What are the characteristics of the singly innervated white global fibers? - ANS--Fast
twitch
-Low fatigue resistance
What are the characteristics of the singly innervated white orbital fibers? - ANS--Mixed
fast twitch and slow tonic
-Moderate fatigue resistance
What are the extrinsic muscles of the eye? - ANS--Rectus muscles (4)
-Oblique muscles (2)
What are the horizontal rectus muscles? - ANS-MR
LR
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 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 modockochieng06. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.18. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73314 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now