Question | Answer |
The time between application of a stimulus to a motor neuron and the beginning of a contracton | The lag phase |
The time of contaction | Contraction phase |
The time during which the muscle relaxes | Relaxation phase |
Where the muscle remains contracted eithout relaxing | Tetany |
The increase in number of motor units being activated | Recruitment |
When at rest they can't stockpile ATP but they can store another high-energy molecule | Creatine phosphate |
without oxygen | Anaerobic respiration |
with oxygen (more efficient) | Aerobic respiration |
The amount of oxygen needed in chemical reactions to convery lactic acid to glucose and to replenish the depleted stores of creatine phosphate stores in muscle cells | Oxygen Dept |
results when ATP is used during muscle contraction faster than it can be produced in the muscle cells | Muscle fatigue |
Equal distance | Isometric |
Equal tension | isotonic |
constant tension produced by muscles of the body for long periods of time | muscle tone |
contract quickly and fatigue quickly | Fast-twitch fibers |
contract slowly and are more resistant to fatigue | Slow-twitch fibers |
the most stationary end of the muscle | origin |
The end of the muscle undergoing the greatest movement | insertion |
the portion of the muscle between the origin and the insertion | belly |
muscles that work together to accomplish specific movements | synergists |
muscles that work in opposition to one another | antagonists |
muscle plays the major role in accomplishing the desired movement | prime mover |
raises the eye brows | occipto frontails |
closes eyelids | orbicularris |
the kissing muscle | orbicularis |
chewing muscle | buccinator |
smiling muscle | zygomaticus |
covers the angle of the lower jaw | masseter |
overlines the temporal bone | temporalis |
covers the anterolateral neck | platysma |
muscles on each sides of the neck | sternodei domastoid |
covers the upper part of the chest | pectoralis major |
deep muscles found between the ribs | intercostal muscles |
reinforces the body trunk | muscles of the abdominal girdle |
muscles of the posterior neck and upper trunk | trapzius |
flat muscle pair that covers the lower back | latissimus borsi |
a prime mover of back extension | erector spinae |
form the rounded shape of your shoulders | beltoid |