01:119:101 Lecture Notes - Lecture 1: Endoplasmic Reticulum, Myocyte, Aponeurosis

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:101
• Professor: uzwiak

Document Summary

Facia is dense connective tissue that holds muscles in place. Tendons are extentions of the facia connecting muscle to bone. Aponeuroses are sheets of connective tissue connecting muscle to muscle. Epimysium is the ct surrounds a skeletal muscle. Endomysium is ct separates muscle cells within fasicles. Myofibrils are within a fasicle; made of myofiliments. Muscle fiber is multinucleated muscle cell attatched to ct. Sarcoplasm is cytoplasm containing nuclei, mitochondria, & myofibrils. Myosin is thick filament, twisted protein strands, cross-bridges. Cross-bridges are the globular end of protein strand. Actin is thin filament, with tropomyosin and troponin. A band is the dark area, actin + myosin, attatched to z line by titin. Sarcoplasmic reticulum is a network of membranous sacs surrounding myofibrils. Transverse tubules extend deep into the sarcoplasm and contain extracellular fluid; allow a multinucleated muscle fiber to be stimulated simultaneously. Cisternae are enlarged portions of the sarcoplasmic reticulum. Neuromuscular junction is where the motor neuron axons join the skeletal muscle.