10. Cell Signaling
Classes of Signaling Receptors
Multiple Choice
Multiple ChoiceTestosterone does not affect all cells of the body because __________.
A
testosterone cannot cross the plasma membrane
B
not all cells in the body have membrane receptors for testosterone
C
it is a local regulator
D
it affects only cells that have ion-channel receptors
E
not all cells have cytoplasmic receptors for testosterone
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