Question
click below
click below
Question
Normal Size Small Size show me how
SKELETON MUSCLE CYTO
Muscles
Question | Answer |
---|---|
SKELETON MUSCLE CYTOLOGY | 1.SARCOLEMMA (CELL MEMBRANE), SARCOPLASMA (CYTOPLASM), MULTINUCLEATED 2. MITOCHONDRIA 3. TRANSVERSE TUBULES 4. SARCOPLASMIC RETICULUM 5. MYOFIBRILS 6. MYOFILAMENTS |
SKELETAL MUSCLE CELLS | SARCOLEMMA (CELL MEMBRANE) SARCOPLASMA (CYTOPLASM) MULTINUCLEATE MUSCLE |
MITOCHONDRIA | RAPID ATP PRODUCTION, PROVIDES ENERY FOR MUSCLE CONTRACTION |
MYOGLUBIN IN MITOCHONDRIA | HOLDS OXYGEN AT MUSCLE UNTIL NEEDED FOR ATP PRODUCTION |
TRANSVERSE TUBULES | CELL MEMBRANE EXTENDS TO INTERIOR OPENS TO OUTSIDE INTERIOR OF TRANSVERSE TUBULES EQUIVALENT TO EXTERNAL ENVIRONMENT CONDUCT IMPULSES FROM SARCOLEMMA TO INTERIOR |
SARCOPLASMIC RETICULUM | STORES CALCIUM, REQUIRED FOR MUSCLE CONTRACTION TRERMINAL CISTERNAE - PAIRS OF SR TUBULES ON EITHER SIDE OF T TUBULES, FORMS TRIADS |
TERMINAL CISTERNA | PAIR OF SR TUBULES ON EITHER SIDE OF T TUBULES |
MYOFIBRILS | BUNDLE OF THIN AND THICK MYOFILABMENTS |
MYOFILAMENTS | THIN (ACTIN PROTIEN, SMALL DIAMETER), THICK (MYOSIN PROTEIN, LARGE DIAMETER) ARRANGED IN GROUPS CALLED SARCOMERES |
SARCOMERES | ARE SMALLEST CONTRACTIN UNIT SPACE BETWEEN 2 SUCCESIVE Z LINES THIN MYOFILAMENTS EXTEND PAST THICK WITHIN SARCOMERES |
Z LINE | ANCHOR THIN MYOFILAMENTS, EXTEND IN OPPOSITE DIRECTIONS |
A BAND | THIN, THICK MYOFILAMENTS OVERLAP, FORM STIATIONS |
I BAND | THIN MYOFILAMENTS ONLY, INCLUDES Z LINE |
H ZONE | SPACE BETWEEN THIN MYOFILAMENTS THICK MYOFILAMENTS ONLY |
M LINE | PROTIENS SECURED THICK MYOFILAMENT IN CENTER OF SARCOMERE |
TITIN | EXTENDS FROM Z LINE THROUGH THICK MYOFILAMENTS TO M LINE HOLD THICK MYOFILAMENTS IN PLACE CONTRIBUTE TO MUSCLE CELL ELASTICITY - RETURN TO RESTING LENGTH |