Result from stretching a muscle too far, causing some of the fibers to tear apart.
tetanus
muscle cramps
pulled muscle
skeletal muscle
2. Multiple Choice
30 seconds
1 pt
Muscle fibers that break down ATP quickly, so they can contract quickly.
fast-twitch fibers
slow-twitch fibers
twitch
fasciitis
3. Multiple Choice
1 minute
1 pt
The principle that muscle cells always contract completely each time they are stimulated by their motor neuron, and that they do not contract at all if they are not stimulated by their motor neuron.
motor neuron
all-or-none principle
motor unit
isometric
4. Multiple Choice
30 seconds
1 pt
A complete cycle of contraction and relaxation in a muscle cell.
mysoin
actin
twitch
origin
5. Multiple Choice
30 seconds
1 pt
Any of the elongated contractile threads found in striated muscle cells.
origin
myofibrils
myosin
fasciitis
6. Multiple Choice
30 seconds
1 pt
The end of a muscle that is attached to the bone that does not move during muscular contraction.
actin
origin
myosin
fatigue
7. Multiple Choice
30 seconds
1 pt
Condition of feeling tired or weary.
tetanus
actin
fatigue
origin
8. Multiple Choice
30 seconds
1 pt
The mechanism of muscle contraction.
sarcoplasmic reticulum
fasciitis
sliding filament mechanism
muscle cramps
9. Multiple Choice
30 seconds
1 pt
Region where a motor neuron comes in close contact with a muscle cell.
neurotransmitter
muscular dystrophy
muscle tension
neuromuscular junction
10. Multiple Choice
30 seconds
1 pt
The force exerted by a contracting muscle.
muscle tension
summation
muscle cramps
insertion
11. Multiple Choice
30 seconds
1 pt
Involves inflammation of the connective tissue sheath, or fascia, that surrounds a muscle.
origin
fatigue
fasciitis
actin
12. Multiple Choice
30 seconds
1 pt
One of the principal contractile proteins found in muscle.
myosin
origin
twitch
actin
13. Multiple Choice
30 seconds
1 pt
The end of a muscle attached to the bone that moves when the muscle contracts.
isotonic
summation
insertion
actin
14. Multiple Choice
30 seconds
1 pt
A group of inherited muscle-destroying diseases.
meuromuscular junction
muscle cramps
muscular dystrophy
muscle tension
15. Multiple Choice
30 seconds
1 pt
A somatic motor neuron and all the muscle cells that it stimulates.
myosin
isotonic
motor neurons
motor unit
16. Multiple Choice
30 seconds
1 pt
The involuntary muscle is a muscle composed of cylindrical multinucleate cells with obvious striations.
True
False
17. Multiple Choice
30 seconds
1 pt
Skeletal muscle is a result from stretching a muscle too far, causing some of the fibers to tear apart.
True
False
18. Multiple Choice
30 seconds
1 pt
Tetanus is a contractile protein of muscle.
True
False
19. Multiple Choice
30 seconds
1 pt
Actin is one of the principal contractile proteins found in muscle.
True
False
20. Multiple Choice
30 seconds
1 pt
Slow-twitch fibers are muscle fibers that break down ATP quickly, so they can contract quickly.
True
False
21. Multiple Choice
30 seconds
1 pt
Summation is the end of a muscle attached to the bone that moves when the muscle contracts.
True
False
22. Multiple Choice
1 minute
1 pt
Motor neurons are a neuron in the peripheral nervous system that conducts nerve impulses from the central nervous system to body tissues and organs.
True
False
23. Multiple Choice
30 seconds
1 pt
Muscle cramps are the force exerted by a contracting muscle.
True
False
24. Multiple Choice
30 seconds
1 pt
A sarcomere involves inflammation of the connective tissue sheath, or fascia, that surrounds a muscle.
True
False
25. Multiple Choice
30 seconds
1 pt
Recruitment is increasing tone (or force) by activating more motor units.
True
False
26. Multiple Choice
30 seconds
1 pt
Neurotransmitter is a chemical released by a neuron that may stimulate or inhibit other neurons or effector cells.
True
False
27. Multiple Choice
1 minute
1 pt
Sarcoplasmic reticulum is specialized endoplasmic reticulum of muscle cells that surrounds the myofibrils and stores the calcium needed for the initiation of muscle contraction.
True
False
28. Multiple Choice
30 seconds
1 pt
Isotonic is contracts that occur whenever a muscle shortens while maintaining a constant force.
True
False
29. Multiple Choice
30 seconds
1 pt
Isometric is contracts that occur whenever a muscle shortens while maintaining a constant force.
True
False
30. Multiple Choice
1 minute
1 pt
Oxygen debt is the end of a muscle that is attached to the bone that does not move during muscular contraction.