Two receptors, A and B, can bind the same chemical signaling molecules but the concentration of those molecules required to reach 50% saturation is twice as great for receptor B. Therefore, the receptors have the same ________, but different ________.

A. affinity; competition
B. specificity; affinity
C. affinity; specificity
D. specificity; saturation
E. competition; affinity


Answer: B

Anatomy & Physiology

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