NSCA – Questions With Proper Solutions
Skeletal muscles Correct Answer - allows us to run, jump, lift
and throw.
Fasciculus/ fascicle Correct Answer - bundle of muscle fibers
Adenosine triphosphate (ATP) Correct Answer - only direct
source of energy for muscle actions
Mitochondria Correct Answer - sites of aerobic ATP
production within the cell and thus of great importance for aerobic
exercise performance
Sarcoplasmic reticulum Correct Answer - stores calcium and
regulates the muscle action process by altering the intracellular
calcium concentration
T-tubules Correct Answer - channels that form from openings
in the sarcolemma of the muscle cell.
Muscle fiber Correct Answer - cell that is specialized to
contract and generate force (tension)
Myofibrils Correct Answer - columnar protein structures that
run parallel to the length of the muscle fiber
Myofilaments Correct Answer - bundle in myofibril which
consist of myosin (thick) and actin (thin) filaments.
Sarcomere Correct Answer - basic contractile unit of muscle
G-actin proteins (globular) Correct Answer - each filament is
formed from individual g-actin proteins. assemble into F-actin.
, Tropomyosin and Troponin Correct Answer - regulate actin
and myosin.
Neuromuscular junction Correct Answer - communication
between nervous and muscle systems
Events leading to muscle activation Correct Answer - 1.
Release of ACh (acetylcholine) at the nueromuscular junction.
2. release of calcium from sarcoplasmic recticulum, triggered by
propogation of an action potential down the T-tubules.
3. binding of calcium to tropinin causes the movement of
tropomyosin off the binding sites along actin. This allows for cross-
bridge formation between myosin and actin , and the process of
force generation.
Sliding Filament Theory Correct Answer - muscle shortens or
lengthens because the actin and myosin filaments slide past each
other, without the filaments changing length.
Concentric Correct Answer - amount of force produced by a
muscle is greater than the external resistance acting in the opposite
direction (muscle shortens)
Eccentric Correct Answer - amount of force produced by
muscle is less than the external resistance. muscles will lengthen.
Isometric (static) Correct Answer - muscles remains same
length
DOMS Correct Answer - Delayed onset muscle soreness
Skeletal muscles Correct Answer - allows us to run, jump, lift
and throw.
Fasciculus/ fascicle Correct Answer - bundle of muscle fibers
Adenosine triphosphate (ATP) Correct Answer - only direct
source of energy for muscle actions
Mitochondria Correct Answer - sites of aerobic ATP
production within the cell and thus of great importance for aerobic
exercise performance
Sarcoplasmic reticulum Correct Answer - stores calcium and
regulates the muscle action process by altering the intracellular
calcium concentration
T-tubules Correct Answer - channels that form from openings
in the sarcolemma of the muscle cell.
Muscle fiber Correct Answer - cell that is specialized to
contract and generate force (tension)
Myofibrils Correct Answer - columnar protein structures that
run parallel to the length of the muscle fiber
Myofilaments Correct Answer - bundle in myofibril which
consist of myosin (thick) and actin (thin) filaments.
Sarcomere Correct Answer - basic contractile unit of muscle
G-actin proteins (globular) Correct Answer - each filament is
formed from individual g-actin proteins. assemble into F-actin.
, Tropomyosin and Troponin Correct Answer - regulate actin
and myosin.
Neuromuscular junction Correct Answer - communication
between nervous and muscle systems
Events leading to muscle activation Correct Answer - 1.
Release of ACh (acetylcholine) at the nueromuscular junction.
2. release of calcium from sarcoplasmic recticulum, triggered by
propogation of an action potential down the T-tubules.
3. binding of calcium to tropinin causes the movement of
tropomyosin off the binding sites along actin. This allows for cross-
bridge formation between myosin and actin , and the process of
force generation.
Sliding Filament Theory Correct Answer - muscle shortens or
lengthens because the actin and myosin filaments slide past each
other, without the filaments changing length.
Concentric Correct Answer - amount of force produced by a
muscle is greater than the external resistance acting in the opposite
direction (muscle shortens)
Eccentric Correct Answer - amount of force produced by
muscle is less than the external resistance. muscles will lengthen.
Isometric (static) Correct Answer - muscles remains same
length
DOMS Correct Answer - Delayed onset muscle soreness
