Multiple choice

Which of the following is the category of hormones that use secondary messengers?

  1. Nonsteroid

  2. Steroid

  3. Both (1) and (2)

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nonsteroid hormones (like peptide or amino acid-derived hormones) are water-soluble and cannot cross the cell membrane, so they bind to surface receptors and trigger secondary messengers like cAMP. Steroid hormones are lipid-soluble and act directly on intracellular receptors.

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