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Muscular system
Muscles
| Term | Definition |
|---|---|
| Cardiac muscle | Involuntary, appear striped or striated, found only in heart |
| Smooth muscle | Involuntary, non-striated, found in the digestive tract, blood vessels, bladder ,Airways ,and uterus |
| Skeletal muscle | Voluntary, appears markedly striated, attached to Bone and causes movement of the body |
| Deltoid | abducts flexes and rotates the arm involved in swinging the arm |
| Pectoralis major | flexes and adducts the upper arm such as when climbing or hugging |
| Rectus abdominis | Flexes the lumbar region of the spinal cord to cause bending at the waist |
| Frontalis | Raises the eyebrows |
| Sternocleidomastoid | Flexes the head |
| Muscles used for breathing | the external intercostals the internal intercostals and diaphragm |
| Trapezius | raises and lowers the shoulders |
| Latissimus dorsi | Adducts the humerus extends the upper arm backward such as when running or swimming |
| Brachialis | Prime mover when flexing the forearm |
| Triceps brachii | Prime mover when extending the forearm |
| Iliopsoas | Flexes the thigh |
| Sartorius | Longest muscle in the body aids in flexion of the hip and knee |
| Quadriceps femoris | most powerful muscle in body |
| Gastrocnemius | The more superficial muscle bulging calf muscle |
| External intercostals | Elevate the ribs during inspiration |
| Internal intercostals | Depress the ribs during forced exhalation |
| Diaphragm | Enlarges the thorax to trigger inspiration |
| Prime mover | Main muscle triggering movement |
| Synergist | Muscles that assist with movement |
| Atrophy | Lack of muscle use cause muscle to shrink |
| Incomplete tetanus | Condition of Rapid contraction with only partial relaxation |
| Threshold | Minimum voltage needed to cause muscle fiber contraction |
| Muscle fiber | Skeletal muscle cell |
| Epimysium | Layer of connective tissue that surrounds the muscle as a whole and binds all the muscle fibers together |
| Tendons | Strong cords of fibrous connective tissue |
| muscles attached to Bones by | Tendons |
| Myofibril | long protein bundles that fill the sacroplasm store glycogen and oxygen |
| Muscle tone | a continuous state of partial muscle contraction in which muscles are at their own optimal resting length |
| Motor unit | A new run motor and all the fibers it stimulates |
| Contraction force is affected by | Muscle size degree of stretch and number of muscle fibers Contracting |
| Muscle contraction requires | ATP and calcium |
| Skeletal muscle contraction requires | The stimulation by a motor neuron |
Created by:
Bravnunez
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