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:

1. Analyze each option:

• Option 1: Hormones act on target cells which have specific receptors. Heart cells having specific receptors for thyroid hormone (to allow intake) is a valid reason for the hormone's effect on the heart.
• Option 2: Heart and endocrine glands (like thyroid) have different cell types with different functions, so this is incorrect.
• Option 3: Only endocrine cells/glands produce hormones, not all cells, so this is incorrect.
• Option 4: Thyroid hormone acts on heart (target) cells which are specialized to respond to it, so this explains the function.
• Option 5: Thyroid cells and cardiac cells have the same DNA (different genes expressed), so this is incorrect.

Answer:

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