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SKELETON MUSCLE CYTO

Muscles

QuestionAnswer
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
Created by: d1975f