EFFECTS OF THYROID HORMONE ON TARGET TISSUES
MOST EFFECTS OF THYROID HORMONE ARE “PERMISSIVE”:
 THYROID HORMONE PROMOTES SYNTHESIS OF PROTEINS WHICH ARE THEN
REGULATED ACUTELY BY OTHER HORMONES.
THYROID DISEASES
METABOLISM
THYROID HORMONE INCREASES:
BASAL METABOLIC RATE
BODY TEMPERATURE
CARDIAC OUTPUT/ TACHYCARDIA
MOBILIZATION OF ENERGY STORES
“ENDEMIC” HYPOTHYROIDISM
 DUE TO IODIDE DEFICENCY
OR GOITROGENS.
 READILY PREVENTED BY
IODIDE SUPPLEMENTATION
OF FOOD
GROWTH AND DEVELOPMENT
THYROID HORMONE REQUIRED IN
PERINATAL PERIOD FOR:
NEURAL DEVELOPMENT
BONE GROWTH  (GH)
HYPERTHYROIDISM
AUTOIMMUNE “GRAVES DISEASE”
 PITUITARY TUMOR
THYROID TUMOR
 WEIGHT LOSS