Neurons in the hypothalamus secrete thyroid-releasing hormone (trh). trh stimulates cells in the anterior pituitary to secrete thyroid-stimulating hormone (tsh). tsh binds to receptors on epithelial cells in the thyroid gland, stimulating synthesis and secretion of thyroid hormones (ths). when the concentration of ths reaches 8 ng/ml, the neurons in the hypothalamus are inhibited from producing trh. if a person was given an injection of 52 ng/ml tsh, what effect would it have on trh production?
it would double.
it would quadruple.
it would remain the same.
it would slow or stop.