AND 100% CORRECT ANSWERS|LATEST
Which of the following substances regulates muscle actions?
a. Potassium
b. Calcium
c. Troponin
d. Tropomyosin - ANSWER b. Calcium
Which of the following substances acts at the neuromuscular junction to excite the muscle
fibers of a motor unit?
a. Acetylcholine (ACH)
b. ATP
c. Creatine Phosphate
d. Serotonin - ANSWER a. Acetylcholine (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?
a. Golgi tendon organ
b. Muscle spindle
c. Extrafusal muscle
d. Pacinian corpuscle - ANSWER b. Muscle spindle
1
,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 (SNS) - ANSWER b. SA Node
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. II and IV only
Which of the following is the definition of power?
a. (mass) x (acceleration)
b. (force) x (distance)
c. (force) x (velocity)
d. (torque) x (time) - ANSWER c .(force) x velocity
2
,To compare performances of Olympic weightlifters of different body weights, the classic
formula divides the load lifted by the athlete's (blank)?
a. body weight
b. body weight squared
c. lean body weight
d. body weight to the two-thirds power - ANSWER d. body weight to the two-thirds
power
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
c. I, II, and III only
d. II, III, and IV only - ANSWER a. I and III only
A vertical jump involves knee, hip, and shoulder movement primarily in which of the
following anatomical planes?
a. sagittal
b. perpendicular
c. frontal
d. transverse - ANSWER a. sagittal
3
, 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?
I. 1st class
II. 2nd class
III. 3rd class
a. I only
b. II only
c. I and III only
d. II and III only - ANSWER c. I and III only
Which of the following substances can be metabolized anaerobically?
a. glycerol
b. glucose
c. amino acids
d. free fatty acids - ANSWER b. glucose
Which of the following reactions is the primary cause of metabolic acidosis (i.e., the
decrease in intramuscular pH during high-intensity, fatiguing exercise)?
a. ATP --> ADP + Pi + H
b. pyruvate + NADH --> lactate + NAD
c. ADP + creatine phosphate --> ATP + creatine
d. fructose-6-phosphate --> fructose-1,6-bisphosphate - ANSWER a. ATP --> ADP + Pi
+H
4
Which of the following substances regulates muscle actions?
a. Potassium
b. Calcium
c. Troponin
d. Tropomyosin - ANSWER b. Calcium
Which of the following substances acts at the neuromuscular junction to excite the muscle
fibers of a motor unit?
a. Acetylcholine (ACH)
b. ATP
c. Creatine Phosphate
d. Serotonin - ANSWER a. Acetylcholine (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?
a. Golgi tendon organ
b. Muscle spindle
c. Extrafusal muscle
d. Pacinian corpuscle - ANSWER b. Muscle spindle
1
,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 (SNS) - ANSWER b. SA Node
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. II and IV only
Which of the following is the definition of power?
a. (mass) x (acceleration)
b. (force) x (distance)
c. (force) x (velocity)
d. (torque) x (time) - ANSWER c .(force) x velocity
2
,To compare performances of Olympic weightlifters of different body weights, the classic
formula divides the load lifted by the athlete's (blank)?
a. body weight
b. body weight squared
c. lean body weight
d. body weight to the two-thirds power - ANSWER d. body weight to the two-thirds
power
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
c. I, II, and III only
d. II, III, and IV only - ANSWER a. I and III only
A vertical jump involves knee, hip, and shoulder movement primarily in which of the
following anatomical planes?
a. sagittal
b. perpendicular
c. frontal
d. transverse - ANSWER a. sagittal
3
, 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?
I. 1st class
II. 2nd class
III. 3rd class
a. I only
b. II only
c. I and III only
d. II and III only - ANSWER c. I and III only
Which of the following substances can be metabolized anaerobically?
a. glycerol
b. glucose
c. amino acids
d. free fatty acids - ANSWER b. glucose
Which of the following reactions is the primary cause of metabolic acidosis (i.e., the
decrease in intramuscular pH during high-intensity, fatiguing exercise)?
a. ATP --> ADP + Pi + H
b. pyruvate + NADH --> lactate + NAD
c. ADP + creatine phosphate --> ATP + creatine
d. fructose-6-phosphate --> fructose-1,6-bisphosphate - ANSWER a. ATP --> ADP + Pi
+H
4
