Insulin can activate lipid synthesis in adipose cells and block breakdown of glycogen in the liver. How could one hormone have different effects on different organs?
A. Adipose and liver cells may have unique signal transduction pathways activated by insulin.
B. Adipose cells do not express the insulin receptor while liver cells do.
C. Adipose and liver cells may contain different transcription factors that regulate the expression of different genes.
D. Adipose and liver cells may express distinct insulin receptors.
Answer: D
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