BUNDLE 2026 TEST BANK
COMPLETE QUESTIONS SOLUTIONS
GRADED A+
◉ Which of the following substances acts at the NMJ to excite the
muscle fibers of a motor unit?
acetylcholine
ATP
creatine phosphate
serotonin.
Answer: acetylcholine
◉ 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?
golgi tendon organ
muscle spindle
extrafusal muscle
pacinian corpuscle.
Answer: muscle spindle
,◉ From which of the following is the heart's electrical impulse normally
initiated?
AV node
SA node
the brain
the sympathetic nervous system.
Answer: SA node
◉ Which of the following occurs during the QRS complex of a typical
ECG?
1. depolarization of the atrium
2. repolarization of the atrium
3. repolarization of the ventricle
4. depolarization of the ventricle
a. 1 and 3 only
b. 2 and 4 only
c. 1, 2, and 3 only
d. 2, 3, and 4 only.
Answer: b. 2 and 4 only
◉ Which of the following is the definition of power?
mass x acceleration
,force x distance
force x velocity
torque x time.
Answer: force x velocity
◉ 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 two-thirds power.
Answer: body weight to the two-thirds power
◉ During a free weight exercise, muscle force varies with which of the
following?
1. perpendicular distance from the weight to the body joint
2. joint angle
3. movement acceleration
4. movement velocity squared
a. 1 and 2 only
b. 1 and 4 only
, c. 1, 2, and 3 only
d. 2, 3, and 4 only.
Answer: a. 1 and 2 only (perpendicular distance from the weight to the
body joint AND joint angle)
◉ A vertical jump involves knee, hip, and shoulder movement primarily
in which of the following anatomical planes?
sagittal
perpendicular
frontal
transverse.
Answer: sagittal
◉ An athlete is performing a concentric isokinetic elbow flexion and
extension exercise. Which of the following type(s) of lever occur(s) at
the elbow during this exercise?
1. 1st class
2. 2nd class
3. 3rd class
a. 1 only
b. 2 only