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.
a rapid or fast-twitch muscle in which pale, large white fibers predominate; mitochondria and myoglobin are relatively sparse compared with findings in red muscle; involved in phasic contraction. rapid or fast-twitch muscle in which pale, large white fibers predominate; mitochondria and myoglobin are relatively sparse compared with red muscle; involved in phasic contraction. categories of muscle fibre adapted for various modes of use.