It grows up to 12 feet tall in USDA zones 5 through 9. Another shrub, called the wayfaringtree viburnum (Viburnum lantana Mohican), grows 7 or 8 feet tall, blooms for three weeks in May and produces orange-red berries in July that ripen to black near summer's end. It grows in USDA zones 4 through 8.
fast-twitch (FT) fiber. a muscle fiber that can develop high tension rapidly. It is usually innervated by a single alpha neuron and has low fatigue resistance, low capillary density, low levels of aerobic enzymes, and low oxygen availability. FT fibers are used in such activities as sprinting, jumping, and weight-lifting.
the union between connective tissue investing muscles and anchoring connective tissue. type I muscle fiber. see slow-twitch skeletal muscle (above). type II muscle fiber. see fast-twitch skeletal muscle (above).ny of the cells of skeletal or cardiac muscle tissue. Skeletal muscle fibers are cylindrical polynuclear cells containing contracting myofibrils, across which run transverse striations, enclosed in a sarcolemma.