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FASCILE PATTERN

Muscles

QuestionAnswer
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
Created by: d1975f