What is the mode of action of hormones?
A. Steroid hormones enter the cell, usually bind to receptors in the nucleus and result in the activation of certain genes.
B. Peptide hormones bind to cell-surface receptors and result in the activation of enzymes, while steroid hormones enter the cell, usually bind to receptors in the nucleus and result in the activation of certain genes.
C. Hormones are chunks of DNA that are sent out to be incorporated into target cells and become activated to produce hormone products.
D. Peptide hormones bind to cell-surface receptors and result in the activation of enzymes.
E. Hormones are actually precursors or raw materials that are naturally converted to end products by the correct target cell.
Answer: B
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