Steroid hormones, such as testosterone and estrogen, are polar signaling molecules.
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Q5: Substance A is synthesized in the liver,
Q6: Adjacent plant cells utilize _ to rapidly
Q7: An example of a nonpolar signaling molecule
Q8: In order for a cell to respond
Q9: In the liver, the enzyme glycogen phosphorylase
Q11: Nonpolar signaling molecules enter the cell by
Q12: After the binding of a signaling molecule
Q13: An active phosphatase adds phosphate groups to
Q14: The system of communication between cells through
Q15: In plants, the IP3/DAG pathways control the
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