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NSCA CSCS EXAM Question and answers 100% correct

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NSCA CSCS EXAM Question and answers 100% correct sliding filament theory in the correct order: - correct answer 1. The muscle cell is activated 2. Calcium is released from the SR into the sarcoplasm 3. Calcium binds to troponin 4. Troponin shifts its position, pulling tropomyosin away fr...

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  • November 28, 2024
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  • 2024/2025
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NSCA CSCS EXAM Question and
answers 100% correct
sliding filament theory in the correct order: - correct answer ✔1. The muscle
cell is activated
2. Calcium is released from the SR into the sarcoplasm
3. Calcium binds to troponin
4. Troponin shifts its position, pulling tropomyosin away from the active site on
the actin.
5. The active site on actin is exposed
6. ATP binds to myosin and is hydrolyzed by ATPase, thereby releasing
energy. This process activates the myosin heads and cocks it into a high-
energy, extended position.
7. The head of myosin binds to an exposed active site on actin, generating a
cross-bridge between actin and myosin.
8. The head of myosin pulls on the actin filament (called the POWER stroke)
to slide the action along the myosin.
9. A new ATP molecule binds to the emptied ATP binding site on the myosin
head, causing the release of the actin myosin bond.
10. If there's an open active site on actin aligned with the released myosin
head, the preceding 4 steps are repeated as long as the muscle fiber remains
activated.
11. If the cell is no longer activated, everything returns to its resting state.


When the muscle is too short, the thin filaments overlap, and active sites on
actin get covered. If the active sites are covered, myosin can't bind. What
happens to the force when the myosin can't bind to actin? - correct answer
✔The forces decreases

,Movement can be manipulated to increase force output by muscles. For
example, let's say a ski racer is at the top of the course. She gets ready to
start by rocking back and forth. When the start signal sounds, she pulls back
and catapults herself out of the gate. At the start of her second race, she
doesn't pull back, but just pushes forward out the gate. In which case will the
skier leave the gate more quickly? - correct answer ✔The first, with a pull-
back


Which substance regulates muscle actions? - correct answer ✔Calcium


Which substances acts at the neuromuscular junction to excite the muscle
fibers of the motor unit? - correct 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? - correct answer
✔Muscle spindle


From which is the the heart's electrical impulse normally initiated? - correct
answer ✔SA node


What occurs during the QRS complex of a typical ECG? - correct answer
✔Repolarization of the atrium & depolarization of the ventricle ONLY


The pelvis is located ______ to the patella. - correct answer ✔superior


What is the smallest contractile unit of skeletal muscle? - correct answer
✔sarcomere

,What describes type 1 muscle fibers? - correct answer ✔fatigue resistant
with high aerobic energy supply


What describes the flow of blood? - correct answer ✔1. RA
2. RV
3. lungs
4. LA
5. LV
6. Body


On average, how many times per minute does the SA node discharge at rest?
- correct answer ✔60-80


Which of the following are the 2 main divisions of the skeletal system? -
correct answer ✔Appendicular and Axial


Some of the highest mineral densities have been seen in which of the
following types of athletes? - correct answer ✔Gymnasts


Which joint comprises the ankle and wrist joints? - correct answer ✔Biaxial


What is the order of the phase of a muscle contraction? - correct answer ✔1.
Resting
2. Excitation-contraction coupling
3. contraction
4. recharge
5. relaxation

, The chronotropic effect is caused by stimulation of the ____ nervous system
and causes the heart rate to _____. - correct answer ✔sympathetic; increase


The insertion of the tendon from the triceps brachia is 5.0 cm from the center
of the elbow for person A and 7.0 cm for person B. Everything else about their
bodies is the exact same. Person A and B are asked to perform a tricep
extension exercise against a 50-lb weight stack. Who will generate more
muscle force to perform the left? - correct answer ✔person A


A baseball player who is not very strong has to choose among several bats of
the same weight? the player would have a mechanical advantage by using
which bat? - correct answer ✔a shorter bat


Tony is a golfer who came to you to ask how he can improve his distance off
the tee. You know that he's already on a great strength training program that
you developed, so you have to look elsewhere for an advantage. Which
suggestion would you offer to help him improve his driving distance? - correct
answer ✔Hold your arms near full extensions you contact the ball (you've
noticed that Tonys elbows are bent quite a bit when he contacts the ball)


Dipping the chin to the chest and then back up to the upright position is neck
movement in which plane? - correct answer ✔sagittal (flexion and extension)


The biceps curl exercises involves movement in which plane? - correct
answer ✔sagittal


When a player performs a sideward soccer kick in which the ball moves in a
direction perpendicular to the direction the player is facing, the thigh and hip
movement takes place in which plane? - correct answer ✔frontal (hip =
adduction)

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