type II muscle cell white muscle cell type IIb muscle cell 2010-09-02T03:31:42Z A type II muscle cell that contains a low content of myoglobin, relatively few mitochondria, relatively few blood capillaries and large amounts of glycogen. Type II B fibres are white, geared to generate ATP by anaerobic metabolic processes, not able to supply skeletal muscle fibres continuously with sufficient ATP, fatigue easily, split ATP at a fast rate and have a fast contraction velocity. type IIb muscle fiber type 2b muscle cell type 2b muscle fiber FMA:84416