Question

select all the correct answers. 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.

Explanation:

• Hormones bind to specific cell receptors, so heart cells need these receptors to respond to thyroid hormone.
• Thyroid hormones act on heart muscle cells (specialized cardiac cells) to exert their effect.
• All cells have the same DNA, only express different genes, so the last option is wrong.
• Heart cells and endocrine gland cells are specialized, not identical, so that option is wrong.
• Only endocrine glands make hormones, not all cells, so that option is wrong.

Answer:

A. The cells in the heart have specific receptors that allow for the intake of hormones.
B. Thyroid hormones show their effect on the heart by means of specialized cells.