Which statement best defines work? work is the time it takes to move an object once acted upon by a force. work occurs when balanced forces act on an object and cause movement in the direction of these forces. work occurs when a force causes motion of an object, and this motion is in the same direction of the applied force. work is the distance over time that an object moves once acted on by a force.

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.