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Muscle Location
Muscle Tissue
Sliding Filament Theory
Mis.
100
What does the orbicularis do?
Raise Eyebrows
100
How many Adductor Muscles do we have?
2
100
What tissues are voluntary?
Skeletal muscle
100
What causes filaments to slide?
When muscle fibers are activated by the nervous system, cross bridges attach to myosin binding sites on thin filaments, and the sliding begins
100
Summarize each disease/condition
Muscular Dystrophy, Duchenne Muscular Dystrophy, and Myasthenia gravis
Muscular Dystrophy- A group of inherited muscles- that destroy diseases that specific muscle groups, the muscle enlarge due to fat and connective tissue, but the muscle fibers degenerate and atrophy
Duchenne muscular Dystrophy- Most common and serious form. This disease progress relentlessly from the extremities upward, finally affecting the head and chest muscles.
Myasthenia Gravis- A disease, drooping of the upper eyelids, difficulty in swallowing, and talking, and muscle weakness and fatigability
200
What is the nickname for the Orbicularis oculi?
The kissing muscle
200
Locate the muscle that abducts the thigh
200
What tissues Striated?
Cardiac muscle and Skeletal muscle
200
The diffusion of what ions move out of the cell?
Potassium ions (K+)
200
What are the two ways graded muscle contractions can be produced?
By changing the speed of muscle stimulation and by changing the number of muscle cells being stimulated.
300
What muscle extends the hip?
Gluteus Maximum
300
Name the 2 muscles within the Quadriceps group.
Rectus Femoris
Vastus Muscles
300
What is the function of muscle tissue?
Contraction or shortening
300
What happens when action potential ends?
Calcium ions are immediately reabsorbed into storage areas, and the muscle cell relaxes and settles back to its original length.
300
What are the two filaments found in the muscle?
Actin and Myosin
400
What muscles flex the wrist and abducts the hand?
Flexor Carpi Radialis
400
Name the 3 muscles in the hamstring group.
Biceps Femoris
Semitendinosus
Semimembranosus
400
Where is smooth muscle found in the body?
Found in the walls of visceral organs
(stomach, urinary bladder, and bronchi of the lungs)
400
What travels over the entire surface of the sarcolemma and is unstoppable?
Action potential
400
What does the Sarcoplasmic Reticulum release?
Calcium
500
What does External Oblique do?
Flexes vertebral column
500
Locate the Extensor Digitorum
500
What special junctions are cardiac cells joined by?
Intercalated disk
500
What happens to acetylcholine during action potential?
Its broken down by enzymes present on the sarcolemma.
500
What is it called when a muscle is stimulated so rapidly that no relaxation is seen and the contractions become completely smooth and sustained?
Tetanus