Osteoporosis, an age related disease of skeletal system , may occur due to

Name a peptide hormone which acts mainly on hepatocytes, adipocytes and enhances cellular glucose uptake and utilization.

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

Graves' disease is caused due to

Choose the correct statement.