CSCS Scientific Foundations Practice 4th ed
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Which of the following substances regulates muscle actions?
a. potassium
b. calcium
c. troponin
d. tropomyosin - CORRECT ANSWER -b
Which of the following substances acts at the neuromuscular junction to excite the muscle fibers
of a motor unit?
a. acetylcholine
b. AT P
c. creatine phosphate
d. serotonin - CORRECT ANSWER -a
When throwing a baseball, an athlete' s arm is rapidly stretched just before throwing the ball.
Which of the following structures detects and responds to that stretch by reflexively increasing
muscle activity?
a. Golgi tendon organ
b. muscle spindle
c. extrafusal muscle
d. Pacinian corpuscle - CORRECT ANSWER -b
From which of the following is the heart's electrical impulse normally initiated?
a. AV node
b. SA node
c. the brain
, d. the sympathetic nervous system - CORRECT ANSWER -b
Which of the following occurs during the QRS complex of a typical ECG?
I. depolarization of the atrium
II. repolarization of the atrium
III. repolarization of the ventricle
IV. depolarization of the ventricle
a. I and III only
b. II and IV only
c. I, II, and III only
d. II, III, and IV only - CORRECT ANSWER -b
Which of the following is the definition of power?
a. (mass) ∙ (acceleration)
b. (force) ∙ (distance)
c. (force) ∙ (velocity)
d. (torque) ∙ (time) - CORRECT ANSWER -c
To compare performances of Olympic weightlifters of different body weights, the classic
formula divides the load lifted by the athlete's
a. body weight
b. body weight squared
c. lean body weight
d. body weight to the two-thirds power - CORRECT ANSWER -d
During a free weight exercise, muscle force varies with which of the following?
I. perpendicular distance from the weight to the body joint II. joint angle
III. movement acceleration
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Which of the following substances regulates muscle actions?
a. potassium
b. calcium
c. troponin
d. tropomyosin - CORRECT ANSWER -b
Which of the following substances acts at the neuromuscular junction to excite the muscle fibers
of a motor unit?
a. acetylcholine
b. AT P
c. creatine phosphate
d. serotonin - CORRECT ANSWER -a
When throwing a baseball, an athlete' s arm is rapidly stretched just before throwing the ball.
Which of the following structures detects and responds to that stretch by reflexively increasing
muscle activity?
a. Golgi tendon organ
b. muscle spindle
c. extrafusal muscle
d. Pacinian corpuscle - CORRECT ANSWER -b
From which of the following is the heart's electrical impulse normally initiated?
a. AV node
b. SA node
c. the brain
, d. the sympathetic nervous system - CORRECT ANSWER -b
Which of the following occurs during the QRS complex of a typical ECG?
I. depolarization of the atrium
II. repolarization of the atrium
III. repolarization of the ventricle
IV. depolarization of the ventricle
a. I and III only
b. II and IV only
c. I, II, and III only
d. II, III, and IV only - CORRECT ANSWER -b
Which of the following is the definition of power?
a. (mass) ∙ (acceleration)
b. (force) ∙ (distance)
c. (force) ∙ (velocity)
d. (torque) ∙ (time) - CORRECT ANSWER -c
To compare performances of Olympic weightlifters of different body weights, the classic
formula divides the load lifted by the athlete's
a. body weight
b. body weight squared
c. lean body weight
d. body weight to the two-thirds power - CORRECT ANSWER -d
During a free weight exercise, muscle force varies with which of the following?
I. perpendicular distance from the weight to the body joint II. joint angle
III. movement acceleration
