

MCQOPTIONS
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1. |
The signaling molecules called steroid hormones |
A. | are hydrophilic and so cannot penetrate the plasma membrane |
B. | are made in one location of the body but have their effects some distance away. |
C. | never enter the blood of humans |
D. | bind to cell surface receptors to trigger chemical cascades |
Answer» C. never enter the blood of humans | |