Ted spent half of his weekly allowance playing arcade games. To earn some more money his parents let him wash the car for $7. What is his weekly allowance if he ended with $14? His allowance is $ .

Second messenger systems: The amino acid-derived hormones epinephrine and norepinephrine bind to beta-adrenergic receptors on the plasma membrane of cells. Hormone binding to receptor activates a G protein, which in turn activates adenylyl cyclase, converting ATP to cAMP.