Muscle Physiology Verified Answers

Muscle Physiology Verified Answers Only skeletal muscles ️️the muscles that the muscular system includes 1movement of the skeleton 2posture and body position 3supports soft tissues 4guards enterence/exit 5maintains body temp ️️functions of the skeletal muscles muscle fibers ️️muscle cells are also called epimysium ️️__ layer of muscle separates muscle from surrounding tissues perimysium ️️__ layer of muscle surrounds muscle fiber bundles (fascicles) endomysium ️️__ layer of muscle surrounds individual muscle cells (muscle fibers) sarcomere ️️what is the smallest contractile unit of muscle tendon (bundle of muscle) aponeurosis (sheet/ broad flat tendon)) ️️endomysium, perimysium, and epimysium come together to form a __(bundle of muscle) or __ (sheet/ broad flat tendon) nevers of CNS ️️skeletal muscles are controlled by 1supply large amounts of O2 and nutrients 2carry away waste ️️functions of blood vessels in muscles more muscle fibers you need ️️the finer your movement is the sarcolemma ️️__ is the cell membrane of a muscle fiber (cell) sarcolemma ️️__ surrounds the sarcoplasm (cytoplasm of muscle fiber) transmembrane potential ️️in sarcolemma, a change in __ begins contraction Transverse tubules (T tubules) ️️__ transmit action potential through cell Transverse tubules (T tubules) ️️__ allow entire muscle fiber to contract simultaneously Transverse tubules (T tubules) ️️__ have the same properties as sarcolemma myofibrils ️️subdivisions within muscle fiber myofibrils ️️made up of protein filaments called myofilaments myofilaments ️️__ are responsible for muscle contraction actin ️️thin filament is made of protein myosin ️️thick filament is made of protein sarcoplasmic reticulum (SR) ️️__ is a membranous structure surrounding each myofibril sarcoplasmic reticulum (SR) ️️__ helps transmit action potential to myofibril sarcoplasmic reticulum (SR) ️️forms chambers (terminal cisternae) attached to T tubules formed by 1 T tubule and 2 terminal cisternae ️️how a triad is formed in terminal cisternae via ion pumps ️️where is the Ca+ stored in the SE sarcomeres ️️terminal cisternae release Ca+ into __ to begin muscle contraction active transport ️️Ca+ from cytosole come into cisternae via myofibril ️️__ are bundles of contractile protein sarcomeres ️️__ are the contractile units of muscle sarcomeres ️️__ are the structural units of myofibrils sarcomeres ️️__ form visible patterns within myofibrils repeating units of sarcomeres, or alternating dark, thick filaments (A bands) and ligt, thin filaments (I bands) ️️__ give muscle its striations I bands ️️__ bands are in thin filaments A bands ️️__ bands are in thick filaments