Steroid hormones are believed to enter target cells via_______________?
Correct answer: C. Simple diffusion
- A. Facilitated diffusion
- B. Carrier - mediated endocytosis
- C. Simple diffusion
- D. Cholesterol lined pores in the plasma membrane
Explanation
Steroid hormones are lipid-soluble, so they cross the phospholipid bilayer by simple diffusion and then bind intracellular receptors. They do not require membrane carriers or endocytosis for entry.
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