Question | Answer |
ability of a muscle to shorten with force | contractibility |
capacity of muscle to respond to a stimuli | excitability |
muscle can be stretchedd to its normal resting length and beyond to a limited degree | extensibility |
ability of muscle to recoil to original resting length after stretched | elasticity |
cell membrane of a muscle cell | sarcolemma |
cytoplasm within the muscle cell | sarcoplasm |
membranous network of channels and tubules within the muscle fiber, corresponding to the endoplasmic reticulum of other cells | sarcoplasmic reticulum |
contractile figers within muscle cells | myofibril |
the strucutral and functional unit of myofibril | sarcomere |
the pigmented comound in muscle tissue that stores oxygen | myoglobin |
when a typical skeletal muscle is teased apart and viewd microscopically, it can be seen to consist of many elongated, cylindrical cells called ________ | muscle fibers |
1 muscle fiber= | 1 skeletal muscle cell |
membranous channel that extends inward from a muscle fibe membrane and passes through the fiber | transverse tubule |
consists of a T-tubule and the segments of sarcoplasmic reticulum on either side | triad |
fibrous connective tissue that separates each muscle fiber in skeletal muscle | endomysium |
skeletal muscle is composed of | muscle cells, connective tissue, blood vessels, nerves |
skeletal muscle fibers are ____ | long, cylindrical, multinucleated |
length of skeletal muscle | 1mm-4cm |
skeletal muscle develops from ____, numbers remain ____ | myoblast, constant |
connective tissue sheet | fascia |
forms layer under the skin | fascia |
holds muscles together and separates them into functional grps | fascia |
carries nerves, blood vessels and lymphatics | fascia |
continuous with connective tissue of tendons and periosteum | fascia |
___-->___-->___-->____-->____ | muscle, fascicle, muscle fiber, myofibrils, thick and thin filaments |
connective tissue covering muscles provide ___, sites for distribution of ___ and ___, and a means of ___ to skeleton | protection, blood vessels, neurons, attatchment |