To which of the following structures do cross-bridges attach during muscle action - Action
Which of the following substances regulates muscle actions - Calcium
Which of the following best describes what occurs during a single controlled concentric muscle action
E.G. Bicep Curl? - Resistance is greater than muscle force
What will increase force produced during a concentric muscle action - Agonist pre-stretching, more
calcium released in the myofibril and decreased activity of the agonist muscle group
Sarcopenia is defined as - reduced muscle size and strength
Which of the following substances acts at the neuromuscular junction to excite the muscle fibers of the
motor unit? - Acetylcholine
Which type of muscle fiber types would be most beneficial for a powerlifter? - Type IIx
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? -
Muscle Spindle
A college volleyball player begins resistance training for the first time. Which of the following muscle
fiber types will hypertrophy first? - Slow-twitch
A 22-year old soccer player begins resistance training for the first time. His chosen exercises include
those for all major muscle groups. After 3 weeks, he notices an increase in lower-extremity strength.
What best explains this athlete's increased lower-extremity strength? - Improved motor control
, Which of the following results from adding resistance training to a marathon runner's training program?
- Short-term endurance may improve
A weight-lifter adds 30 mins of intense stationary bicycle riding every other day to her program, what
describes the effect of this action on her performance - Strength gains are compromised
The knee joint can be described as - synovial
Which of the following defines power - force x velocity
During a concentric free-weight exercise, muscle force varies for which of the following? - Perpendicular
distance from the weight to the body joint, joint angle, movement velocity
A vertical jump involves knee, hip, and shoulder movement primarily in which of the following
anatomical planes? - Saggital
An athlete is performing a standing dumbbell bicep curl exercise beginning from full elbow extension to
full elbow flexion and returning to full elbow flexion. Which of the following types of levers occur at the
elbow during this exercise? - First and Third Class
Resistance exercise programs designed to stimulate new bone formation should emphasize all of the
following EXCEPT: - Metabolic Specificity
A 50-year old female triathlete is concerned about osteoporosis. Which of the following exercises would
be MOST beneficial for improving her bone mineral density? - Front Squat
A 17-year old cross-country runner has been training aerobically for 6 months in preparation for the
upcoming season. Which of the following adaptations will occur in the muscles during this time? -
Hypertrophy of Type I muscle fibers
Which of the following is NOT a primary function of cartilage - Aids in the attachment of muscle to bone
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