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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 |