CSCS Practice Exam 2021/2022 with complete solutions.

CSCS Practice Exam
1. To which of the following structures do the cross-bridges attach during muscle
action?

a. actin
b. myosin
c. M-bridge
d. sarcolemma - Answer actin

2. Which of the following substances regulates muscle actions?

a. potassium
b. calcium
c. troponin
d. tropomyosin - Answer calcium

3. Which of the following substances acts at the neuromuscular junction to excite the
muscle fibers of a motor unit?

a. acetylcholine
b. ATP
c. creatine phosphate
d. serotonin - Answer acetylchooline

4. Which of the following muscle fiber types is the MOST beneficial for a marathon
runner?

a. Type I
b. Type IIa
c. Type IIx
d. Type IIc - Answer Type I

5. 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?

a. Golgi tendon organ
b. muscle spindle
c. extrafusal muscle
d. Pacinian corpuscle - Answer Muscle spindle

6. 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 SA node

,CSCS Practice Exam
7. 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 Repolarization of the atrium; depolarization of the ventricle
(II and IV only)

1. Which of the following is the ultimate source of energy for a muscular contraction?

a. GTP
b. oxygen
c. NADH
d. ATP - Answer ATP

2. Which of the following substances can be metabolized anaerobically?

a. protein
b. carbohydrate
c. fat
d. glycerol - Answer carbohydrate

3. The predominant energy system used during a training session depends primarily on
the

a. session intensity.
b. session duration.
c. athlete's training status.
d. athlete's lean body mass. - Answer Session intensity

4. The production of lactic acid results from the activation of which of the following
energy systems?

a. phosphagen
b. slow glycolysis
c. fast glycolysis
d. fat oxidation - Answer Fast glycolysis

5. Which of the following energy systems has the highest rate of energy production?

a. phosphagen

, CSCS Practice Exam
b. fast glycolysis
c. fat oxidation
d. carbohydrate oxidation - Answer phosphagen

6. Approximately how many ATP are produced via the oxidative energy system from the
degradation of one glucose molecule?

a. 27
b. 36
c. 38
d. 41 - Answer 38

7. Which of the following energy systems is predominantly active at the initiation of all
exercise?

a. oxidative
b. phosphagen
c. slow glycolysis
d. fast glycolysis - Answer phosphagen

8. Which of the following enzymes catalyzes the rate-limiting step of glycolysis?

a. PFK
b. isocitrate dehydrogenase
c. phosphorylase
d. lactate dehydrogenase - Answer PFK

1. After a bout of resistance training, acute hormonal secretions provide all of the
following information to the body EXCEPT

a. amount of physiological stress.
b. metabolic demands of exercise.
c. type of physiological stress.
d. energy expended. - Answer Energy expended

2. Which of the following hormones enhance muscle tissue growth?
I. growth hormone
II. cortisol
III. IGF-I
IV. progesterone

a. I and III only
b. II and IV only
c. I, II, and III only
d. II, III, and IV only - Answer Growth hormone and IGF-1 (I and III only)