<prompt> Which of the following statement regarding cell ageing is TRUE?Free radicals injuryMitochondria are increasedLipofuscin accumulation in the cellSize of cell increased  <response>: Lipofuscin is a complex pigment that is thought to result from end stage lipid peroxidation probably by the oxidation of fat with free radical reactants. Its exact composition varies from cell to cell. It appears to accumulate in cells with highest metabolic activity. It is associated with atrophy of an organ. Lipofuscin is a mixture of lipids and proteins containing a golden brown pigment called ceroid. It tends to accumulate by accretion of oxidized, cross linked proteins and is not digestible. It occurs mainly in terminally differentiated cells neurons and cardiac myocytes or in cells that cycles infrequentlyhepatocytes. Ref: Physiology Secrets edited by Hershel Raff page 317 