ESS 345 HW EXAM QUESTIONS WITH COMPLETE VERIFIED ANSWERS GRADED A++
myosin...
is found in the A band
During muscle contraction...
the H zone becomes smaller or disappears
The SR stores ____ when a muscle is relaxed and releases it for binding to ____ for contraction.
Ca2+, troponin
Binding...
ess 345 hw exam questions with complete verified a
Written for
ESS 345
All documents for this subject (43)
Seller
Follow
NurseAdvocate
Reviews received
Content preview
ESS 345 HW EXAM QUESTIONS WITH COMPLETE
VERIFIED ANSWERS GRADED A++
myosin...
is found in the A band
During muscle contraction...
the H zone becomes smaller or disappears
The SR stores ____ when a muscle is relaxed and releases it for binding to ____
for contraction.
Ca2+, troponin
Binding of ____ to myosin permits cross-bridges ____ between actin and myosin.
ATP, detachment
At rest cross bridge interaction between actin and myosin in skeletal muscle is
directly blocked by ____
tropomyosin
The energy for power stroke during muscle contraction is provided by ____.
ATP
Which of the following is involved in the process of muscle relaxation?
(a and b)
a. Acetylcholinesterase detroys acetylcholine to allow the muscle membrane to return to
resting potential.
, b. Ca2+ is actively taken up by the lateral sacs of SR when there is no longer a local
action potential.
A motor unit refers to ____.
a single motor neuron and all the muscle fibers it innervates.
Twitch summation
(a and c)
a. is a means by which gradation of muscle contraction may be accomplished.
c. results from increasing the frequency at which motor units are firing within a muscle.
If you wanted to pick up something heavier than your pencil (such as your book),
you would need to have a stronger muscle contraction. In what way might you
accomplish this?
stimulate more motor units
If you want to hold a very heavy dumbbell to show your friends how strong you
are, you want to select the best joint angle____
(a and c)
a. where muscle length is optimal
c. where leverage is maximal
What is the energy-rich molecule that powers all biologic work?
ATP
(T/F)
Tetanus occurs when a muscle fiber is stimulated so rapidly that it is not allowed
to relax between stimulations, resulting in a smooth and sustained contraction.
True
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller NurseAdvocate. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R187,16. You're not tied to anything after your purchase.
