Thyroid hormones, when secreted in excess, may cause an increase in the

A. False Increased metabolism leads to peripheral vasodilation.

B. True The frequency of defaecation increases in hyperthyroidism.

C. True Thyroid hormones uncouple oxidation from phosphorylation so that more energy appears as heat.

D. False The reverse is true.

E. True This suggests a direct action on cells in the sinoatrial node.