NSCA-CSCS Exam Chapter 1 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
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
Arteriole - CORRECT ANSWER - small branches of arteries that act as control vessels
through which blood enters the capillaries.Play a major role in the regulation of blood flow to the
extremeities.
Artery - CORRECT ANSWER - Their function is to rapidly transport blood pumped from
the heart.
Atrioventricular (AV) Bundle - CORRECT ANSWER - conducts the electrical impulse to
the ventricles
ACTUAL Exam Questions and CORRECT
Answers
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
Arteriole - CORRECT ANSWER - small branches of arteries that act as control vessels
through which blood enters the capillaries.Play a major role in the regulation of blood flow to the
extremeities.
Artery - CORRECT ANSWER - Their function is to rapidly transport blood pumped from
the heart.
Atrioventricular (AV) Bundle - CORRECT ANSWER - conducts the electrical impulse to
the ventricles
