Term
|
Definition
Located in the walls of hollow organs & blood vessels
-involuntary
-one nucleous |
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Term
|
Definition
Found only in the heart walls
-striated
-involuntary
-one nucleous |
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Term
|
Definition
Make up muscles attatched to skeleton
-striated
-voluntary
-multi-nucleous |
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Term
|
Definition
Vertical lines found in a sarcomere |
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Term
|
Definition
Thick myofilament in myofibril
-made of protein
-capable of breaking down ATP |
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Term
|
Definition
Make up myofibrils
-is the distance between 2 z lines
-contains I Band,A band,H zone |
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Term
Myofilament
Thick Filaments |
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Definition
Relies on calcium ions for cross-bridging |
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Term
| Contraction of Skeletal Muscle |
|
Definition
Steps Involved
-nerve signal arrives @ axon
-synaptic vesicles release AcH
-AcH binds to sarcolemma
-signal travels to SR
-SR releases calcium
-filaments slide |
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Term
| Myosin Binding Sites on Actin Molecules |
|
Definition
Clacium binds to troponin |
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Term
|
Definition
Completed in the mitochondria
-provides most of a muscles ATP |
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Term
|
Definition
Compound in muscle tissue that stores oxygen |
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Term
|
Definition
Single contraction
-lasts a fraction of a second |
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Term
|
Definition
Period between stimulation & contraction |
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Term
|
Definition
When this occurs:
-after strenuous activity
-ATP & oxygen are lacking
-may cause cramps |
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Term
|
Definition
Occurs due to no ATP to relax the muscles
*after death*
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Term
|
Definition
A motor neuron & the muscle fibers it supplies
-obeys the All-or-None law |
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Term
|
Definition
The more stimulation a muscle recieves, the more motor units are activated
-results in stronger muscle contractions |
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Term
|
Definition
Some muscle fibers always contracting
-important in maintaining posture |
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Term
| Muscles of Facial Expression |
|
Definition
Frontalis
Obicularis Oculi, Oris
Buccinator
Zygomaticus |
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Term
|
Definition
Masseter (chewing)
Temporalis |
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Term
|
Definition
Tongue
Buccinators
Palatini
Phrayngeal |
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|
Term
| Muscles that Move the Head |
|
Definition
Sternocleidomastoid
Trapezius |
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|
Term
| Muscles of the Thoracic Wall |
|
Definition
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Term
| Muscles of Abdominal Wall |
|
Definition
Obliques
Transversus Abdominis
Rectus Abdominis |
|
|
Term
| Muscles that Move the Scapula |
|
Definition
Trapezius
Serratus Anterior |
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Term
| Muscles that Move the Arm |
|
Definition
Deltoid
Pectoralis
Rotator Cuffs
Biceps
Triceps |
|
|
Term
| Muscles that Move the Thigh |
|
Definition
Gluteus Maximus, Medius
Adductor group |
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Term
| Muscles that Move the Leg |
|
Definition
Quadriceps
Sartorius
Hamstring |
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Term
| Muscles that Move the Ankle & Foot |
|
Definition
Fibularus
Flexor
Extensor |
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Term
| Muscular Disorders & Neuromuscular Disease |
|
Definition
Cover a wide spectrum in terms of severity
-some disorders may be resolved w/out medical care
-many diseases are fatal |
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Term
|
Definition
Disorder
Sudden, involuntary muscular contractions
-accompanied by pain
-most not serious |
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Term
|
Definition
Chronic condition
-achy pain, tenderness, & stiff muscles
-80-90% of patients are women |
|
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Term
|
Definition
Amyotrophic Lateral Sclerosis
-aka Lou Gehrig's Disease
-gradual death of motor neurons
-loss of ability to walk, talk, chew, swallow, etc.
-ALWAYS fatal |
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