What is a model? A. A replica or visual description designed to show the workings or structure of an object or system

B. A scientific principle based on many observations of naturally occurring events that demonstrate it to be without exception under certain stated conditions

C. A statement that can be tested scientifically through experiments and/or other scientific investigations

D. A conclusion that is supported with evidence from experiments

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.