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Anatomy Muscles
Muscle Quiz
Question | Answer |
---|---|
Cardiac | Found in heart, striated, 1 nucleus, involuntary |
Smooth | Found in viscera, not striated, 1 nucleus, involuntary |
Skeletal | Found in limbs, striated, multinucleate, voluntary |
Hardest working muscle | Eye |
How many muscles to frown | 42 |
How many muscles to smile | 17 |
How much weight do your muscles take up | 50% |
Largest muscle | gluteus maximus |
4 functions of your muscles | Heat, movement, stabilize joints, maintain posture |
Tissue able to contract | muscle |
Controlled by CNS | Skeletal |
Regulated by CNS | Cardiac |
Controlled by ANS | Smooth |
Word for flesh | sarco |
Muscle prefixes | myo, mys |
Tendon | Attaches muscle to bone |
Ligament | Attaches bone to bone |
Collogen | fibers make up |
Viscera | walls line internal organs |
Microfibril | a very fine fibril, or fiber-like strand, consisting of glycoproteins and cellulose |
Twitch | single brief contraction, not a normal muscle function |
Tetanus | one contraction immediately followed by another. Muscle never completely returns to a relaxed state. |
How many muscles in body | 650 |
Abduction | moving away from middle |
Adduction | moving towards middle |
Circumduction | rotate |
Flexion | When angle of joints gets smaller |
Extension | Angle of joints gets larger |
Hyperextension | Goes beyond normal point, beyond straight |
Inversion | Turn sole of foot medially |
Eversion | Turn sole of foot laterally |
Pronation | Palm down |
Supination | Palm up |
Opposition | Thumb touch |
Plantar flexion | point foot down |
Dorsal | Point foot to shin |
Raw energy that muscles use | ATP |
Origin | Attachment to an immovable bone |
Insertion | Attachment to a movable bone |
Isometric | Tension in muscles increase, no movement occurs (pushing one hand against the other) |
Isotonic | Muscles shorten and movement occurs, most normal exercise |
Where does cellular respiration occur | Mitochondria |
Broken into ATPs | Glucose |
What causes muscle fatigue | Not enough oxygen |