Which of the following is correct about electron transport?
a) atp donates its electrons to complex i
b) fadh2 donates its electrons to complex ii
c) ubiquinone (q carrier) receives protons from both complex i and ii
d) protons are pumped into the matrix of the mitochondria

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.