MDCAT Biology MCQ #2469

Cortisol, a lipid-soluble steroid hormone, regulates metabolism. What is its primary mechanism of action upon reaching a target cell?

MDCAT Biology MCQ #2469

  1. Question 1

    Q1. Cortisol, a lipid-soluble steroid hormone, regulates metabolism. What is its primary mechanism of action upon reaching a target cell?

    • A) Binding to surface receptors
    • B) Activation of cAMP
    • C) Binding to intracellular receptors
    • D) Opening of sodium channels

    Answer: Binding to intracellular receptors

    Explanation: Steroids are lipid-soluble and bind intracellularly; peptide hormones are tempting because they require membrane-bound receptors to initiate secondary messenger cascades.