ANATOMY

Detailed explanation-1: -Thyroid hormones affect every cell and all the organs of the body. Too much thyroid hormone speeds things up and too little thyroid hormone slows things down. They: Control the rate at which your body burns calories (your metabolism).

Detailed explanation-2: -Metabolism: thyroid hormone increases the basal metabolic rate. It increases the gene expression of Na+/K+ ATPase in different tissues leading to increased oxygen consumption, respiration rate, and body temperature. Depending on the metabolic status, it can induce lipolysis or lipid synthesis.

Detailed explanation-3: -Thyroid hormone receptors (TRs) are nuclear receptors which control transcription, and thereby have effects in all cells within the body.

Detailed explanation-4: -Thyroid hormone is an endocrine regulator in many target organs (e.g., liver, kidneys, skeletal and cardiac muscles, brain, pituitary gland, placenta).