NSCA-CSCS Exam Chapter 1 Questions
and Answers
To what structures do the cross-bridges attach during muscle action? - ANSWER-Actin
Which substance regulates muscle actions? - ANSWER-Calcium
Which substance acts at the neuromuscular junction to excite the muscle fibers of a motor unit? -
ANSWER...
acetylcholine - ANSWER✔✔-Arrival of the action potential at the nerve terminal causes release of a
neurotransmitter, ______, which diffuses across the neuromuscular junction. Once a sufficient amount is
released, an action potential is generated across the sarcolemma, and the (muscle)fiber contracts.
Actin and Myosin - ANSWER✔✔-contractile proteins in muscle
Action potential - ANSWER✔✔-the change in electrical potential associated with the passage of an
impulse along the membrane of a muscle cell or nerve cell.
All-or-none Principle - ANSWER✔✔-the strength by which a nerve or muscle fiber responds to a stimulus
is independent of the strength of the stimulus. If the stimulus exceeds the threshold potential, the nerve
or muscle fiber will give a complete response; otherwise, there is no response.
Alveolar Pressure - ANSWER✔✔-the pressure in centimeters of water pressure (cmH2O) held within the
alveoli of the lungs during inspiration. The pressure value is the difference from atmospheric pressure,
which is considered zero when establishing the value.
Alveoli - ANSWER✔✔-where gases are exchanged in respiration.
Aortic Valve - ANSWER✔✔-prevents backflow from the aorta into the ventricles during ventricular
relaxation (diastole)
Arterial System - ANSWER✔✔-Carries blood away from the heart
Page 2/12
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 Emillect. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
