CSCS SCIENTIFIC FOUNDATIONS
PRACTICE QUESTIONS 4TH ED AND
ANSWERS WITH SOLUTIONS 2024
Which of the following substances regulates muscle actions?
a. potassium
b. calcium
c. troponin
d. tropomyosin - 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 - 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 - 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 - 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 - ANSWER b
Which of the following is the definition of power?
a. (mass) ∙ (acceleration)
b. (force) ∙ (distance)
c. (force) ∙ (velocity)
d. (torque) ∙ (time) - 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 - 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
IV. movement velocity squared
a. I and III only
b. II and IV only
PRACTICE QUESTIONS 4TH ED AND
ANSWERS WITH SOLUTIONS 2024
Which of the following substances regulates muscle actions?
a. potassium
b. calcium
c. troponin
d. tropomyosin - 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 - 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 - 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 - 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 - ANSWER b
Which of the following is the definition of power?
a. (mass) ∙ (acceleration)
b. (force) ∙ (distance)
c. (force) ∙ (velocity)
d. (torque) ∙ (time) - 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 - 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
IV. movement velocity squared
a. I and III only
b. II and IV only
