Which of the following signal systems use(s) G-protein-linked receptors?
A) yeast mating factors
B) epinephrine
C) neurotransmitters
D) A and C only
E) A, B, and C
Answer: E
Which of the following signal systems use(s) G-protein-linked receptors?
A) yeast mating factors
B) epinephrine
C) neurotransmitters
D) A and C only
E) A, B, and C
Answer: E