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NSCA-CSCS Exam Chapter 1 Newest Exam Questions and answers | Latest 2024/25 RATED A+
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NSCA-CSCS Exam Chapter 1 Newest Exam Questions and answers | Latest 2024/25 RATED A+
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NSCA-CSCS Exam Chapter 1 NewestExam Questions and answers | Latest
2024/25 RATED A+
I
To what structures do the cross-bridges attach during muscle action? - Actin
Which substance regulates muscle actions? - Calcium
Which substance acts at the neuromuscular junction to excite the muscle fibers of a
motor unit? - Acetylcholine
Which muscle fiber type is the MOST beneficial for a marathon runner? - 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? - Muscle Spindle
From what is the heart's electrical impulse normally initiated? - SA Node
Which of the following occurs during the QRS complex of a typical ECG? -
repolarization of the atrium and depolarization of the ventricle.
A-Band - overlapping actin and myosin
acetylcholine - 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 - contractile proteins in muscle
Action potential - 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 - 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 - 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 - where gases are exchanged in respiration.
Aortic Valve - prevents backflow from the aorta into the ventricles during ventricular
relaxation (diastole)
Arterial System - Carries blood away from the heart
Arteriole - 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 - Their function is to rapidly transport blood pumped from the heart.
Atrioventricular (AV) Bundle - conducts the electrical impulse to the ventricles
Atrioventricular (AV) Node - electrical impulses coming from the SA node are delayed
slightly here before passing into the ventricles
Atrioventricular (AV) Valves - consists of the tricuspid and mitral valve and prevent
the flow of blood from the ventricles back into the atria during ventricular contraction
(systole).
Atrium - there are two of these, a right and a left. Their function is to deliver blood to
another chamber of the heart.
Bone Periosteum - a specialized connective tissue covering all bones.
Bradycardia - fewer than 60 beats of the heart per minute
Bronchi - These come after the Trachea in the respiratory system and are known as
second-generation respiratory passages
Bronchiole - These come after the Bronchi in the respiratory system and are known
as an additional generation of respiratory passages
Capillary - their function is to exchange oxygen, nutrients, electrolytes, hormones,
and other substances between the blood and the interstitial fluid in the various tissues in
the body.
Cross-bridge - Globular heads that protrude away from the myosin filament at regular
intervals.
Depolarization - the reversal of the membrane electrical potential, whereby the
normally negative potential inside the membrane becomes slightly positive and the
outside becomes slightly negative
Diastole - Ventricular relaxation
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