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Regulation of the release of T3 and T4 from the thyroid gland is controlled by

negative feedback

Which of the following is a steroid hormone?


To adapt to high hormone concentrations, many target cells have the capacity for


Growth hormone is secreted into the bloodstream by the

anterior pituitary

Target cells for aldosterone are located in the


The primary effect of antidiuretic hormone (ADH) in the kidneys is to stimulate:

water reabsorption.

Calcitonin and parathyroid hormone strictly regulate serum levels of


Which of the following nutrients is essential for thyroid hormone synthesis?


The main function of thyroid hormone (T3 and T4) is control of:

metabolic rate.

Increased thyroid hormone levels in the blood result in:

decreased release of thyroid-stimulating hormone from the anterior pituitary

Which cells in the pancreas secrete insulin?


The primary physiologic effect of insulin is to:

promote glucose uptake into cells.

Which hormone functions as an antagonist to insulin?


High levels of glucocorticoids such as cortisol can result in


Adrenocorticotropic hormone (ACTH) is synthesized and released in the:

anterior pituitary.

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