Upgrade to remove ads
Only $2.99/month

EXSC 415: Neuromuscular Fitness

Terms in this set (19)

What is the most common lever system in the body? The force of the resistance arm is greater than the force of movement.
Third class levers
Epimysium
a sheath of fibrous elastic tissue surrounding a muscle.
Perimysium
The connective tissue that surrounds fascicles.
Fasicle
Bundle of muscle fibers
muscle filaments
actin and myosin
Endomysium
Connective tissue surrounding a muscle fiber
Troponin and tropomyosin
Contraction Inhibiting Proteins within each sarcomere that are attached to actin
Sarcoplasmic reticulum
Organelle of the muscle fiber that stores calcium.
T tubules
Also called transverse tubules, these are deep invaginations of the plasma membrane found in skeletal and cardiac muscle cells. These invaginations allow depolarization of the membrane to quickly penetrate to the interior of the cell.
lateral sacs
The expanded saclike regions of a muscle fiber's sarcoplasmic reticulum; store and release calcium, which plays a key role in triggering muscle contraction
Afferent neurons
Nerve cells that carry impulses towards the central nervous system at the dorsal horn
Efferent neurons
Nerve cells that conduct impulses away from the central nervous system at the ventral horn
What are the four nerve groups?
Alpha, beta, delta, and C
Strength
Maximal force in a single voluntary contraction
isometric contraction
No change in length; no change in position of the object of resistance. Only specific to the joint angle trained and not through the whole ROM
isotonic contraction
Change in muscle length; resistance is moved. Consists of concentric and eccentric movements
Eccentric
muscle lengthening
concentric
muscle shortening
Isokinetic systems
employ a fixed velocity with variable resistance
YOU MIGHT ALSO LIKE...