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NSCA-CSCS Exam Chapter 1 Question and answers verified to pass
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NSCA-CSCS Exam Chapter 1 Question and answers verified to pass To what structures do the cross-bridges attach during muscle action? - correct answer Actin Which substance regulates muscle actions? - correct answer Calcium Which substance acts at the neuromuscular junction to excite the...

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  • November 28, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
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NSCA-CSCS Exam Chapter 1 Question
and answers verified to pass
To what structures do the cross-bridges attach during muscle action? - correct
answer ✔Actin


Which substance regulates muscle actions? - correct answer ✔Calcium


Which substance acts at the neuromuscular junction to excite the muscle
fibers of a motor unit? - correct answer ✔Acetylcholine


Which muscle fiber type is the MOST beneficial for a marathon runner? -
correct answer ✔Type I


When throwing a baseball, an athlete's arm is rapidly stretched just prior to
throwing the ball. Which of the following structures detects and responds to
that stretch by reflexively increasing muscle activity? - correct answer
✔Muscle Spindle


From what is the heart's electrical impulse normally initiated? - correct answer
✔SA Node


Which of the following occurs during the QRS complex of a typical ECG? -
correct answer ✔repolarization of the atrium and depolarization of the
ventricle.


A-Band - correct answer ✔overlapping actin and myosin

, acetylcholine - correct 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 - correct answer ✔contractile proteins in muscle


Action potential - correct 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 - correct 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 - correct 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 - correct answer ✔where gases are exchanged in respiration.


Aortic Valve - correct answer ✔prevents backflow from the aorta into the
ventricles during ventricular relaxation (diastole)


Arterial System - correct answer ✔Carries blood away from the heart

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