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FASCILE PATTERN
Muscles
Question | Answer |
---|---|
FASCILE PATTERNS | REFLECTS MUSCLE ACTION DETERMINES RANGE OF MOTION & POWER |
PARALLEL | FASCILE PARALLEL TO MUSCLE FIBER EXTENDS FROM ORIGIN TO INSERTION STRAP -STERNOCLEIDOMASTIOD FUSIFORM W/ BELLY- BICEPS BRACHII |
CONVERGENT | TRIANGULAR, FAN SHAPED, FIBERS EXTENDS LENGTH OF MUSCLE BROAD ORGIN - FASCICILE CONVERGE TO INSERTION PECTORALIS MAJOR |
PENNATE | SHORT, OBLIQUELY ATTACHED FIBER, TENDON EXTENDS LENGTH OF MUSCLE UNIPENNATE- ATTACH TO 1 SIDE OF TENDON: EG: FLEXOR POLLICIS BIPENNATE - ATTACH TO BOTH SIDES OF TENDON, RECTUS FEMORIS MULTIPENNATE- SEVERAL BIPINATES INSERT INTO 1 TENDON, DELTOI |
CIRCULAR | FASCICLES ARRANGED IN RINGS, SPHINCTER |
HIGHEST TO LOWEST IN MUSCLE | 1. ENTIRE MUCLE 2. FASCICLE 3. MUSCLE CELLS (MUSCLE FIBER, MYOFIBER) 4. MYOFIBRILS- GROUPS OF THIN & THICK MYOFILATMENTS 5. THIN & THICK MYOFILAMENTS 6. SARCORMERE - SMALLEST CONTRACTING UNITS |
HOW THE SARCOMERE CONTRACT | THIN FILAMENTS PULLED PAST THICK TO CENTER OF SARCOMERE |
A BAND | THIN AND THICK OVER LAP |
I BAND | THIN ONLY AND Z LINE |
M LINE | ANCHORS THICK |
H ZONE | BTW END OF THIN WHEN RELAXED |
TITINS | CONNECTS THICK TO Z LINE ALLOWS SARCOMERES TO RETURN TO RESTING LENGH WHEN CONTRACTING ENDS |
MUSCLE FUNCTIONS | 1. MOVEMENT 2. MAINTAINS POSTURE 3. JOINT STABILITY 4. HEAT PRODUCTION - 85 % CHEM ENERGY - MECH ENERGY ATP -CONTRACTION |
CHARACTERISTIC OF MUSCLE | EXCITABILITY - RECEIVE RESPOND TO STIMULI - NEURON/MUSCLE CELL 2. CONTRACTABILITY - SHORTEN WHEN STIMULATED 3. EXTENSIBILITY - EXTENDS PAST RESTING LENGHT 4. ELASTICITY - RETURN RESTING LENGHT |