CSCS study - All questions from Ed. 4 book UPDATED ACTUAL Exam Questions and CORRECT Answers

CSCS study - All questions from Ed. 4 book
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Which of the follow substances regulates muscle actions?

- Potassium, calcium, troponin, tropomyosin - CORRECT ANSWER - Calcium


Which of the following substances acts at the NMJ to excite the muscle fibers of a motor unit?

- ACH, ATP, creatine phosphate, serotonin - CORRECT ANSWER - ACH


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?

- GTO, muscle spindle, extrafusal muscle, pacinian corpuscle - CORRECT ANSWER -
Muscle Spindle


From which of the following is the heart's electrical impulse normally initiated?
- SA node,
- AV node,
- the brain,

- the sympathetic nervous system - CORRECT ANSWER - SA node


Which of the following occurs during the QRS complex of a typical ECG?
- depolarization of the atrium
- repolarization of the atrium
- depolarization of the ventricle

- repolarization of the ventricle - CORRECT ANSWER - Repolarization of the atrium and
depolarization of the ventricle

,Which of the following is the definition of power?
- Mass x acceleration
- force x distance
- force x velocity

- torque x time - CORRECT ANSWER - Force x veloctiy


To compare performances of Olympic weightlifters of different body weights, the classic
formula divides the load lifted by the athlete's:
- Body weight
- body weight squared
- lean body weight

- body weight to the 2/3rds - CORRECT ANSWER - Body weight to the 2/3rds


During a free weight exercise, muscle force varies with which of the following?
- Perpendicular distance from the weight to the body joint,
- joint angle
- movement acceleration

- movement velocity squared - CORRECT ANSWER - Perpendicular distance from the
weight to the body joint and movement acceleration


A vertical jump involves knee, hip, and shoulder movement primarily in which of the following
anatomical planes?
- Sagittal
- perpendicular
- frontal

- transverse - CORRECT ANSWER - Saggital


An athlete is performing a concentric isokinetic elbow flexion and extension exercise. Which of
the following type(s) of levers occur(s) at the elbow during this exercise?

, - First class
- second class

- third class - CORRECT ANSWER - First and third class


Which of the following substances can be metabolized anaerobically?
- Glycerol
- glucose
- amino acids

- free fatty acids - CORRECT ANSWER - Glucose


Which of the following reactions is the primary cause of metabolic acidosis( the decrease of
intramuscular pH during high intensity, fatiguing exercise)?
- ATP>>ADP + P + H
- Pyruvate + NADH >> lactate + NAD+
- ADP+ creatine phosphate>>ATP + creatine

- Fructose6phosphate>>fructose1,6biphosphate - CORRECT ANSWER - ATP >> ADP +
P+H


Which of the following energy systems produces ATP at the the quickest rate?
- phosphagen,
- aerobic glycolysis
- fat oxidation

- fast glycolysis - CORRECT ANSWER - Phosphagen


Approximately how many net ATP are produced via the oxidative energy system from the
metabolism of one glucose molecule?
- 27
- 34
- 38