Am I correct in my thinking about cyclic AMP?
I've been working on this for awhile, but I'm not sure if I'm really getting it. If a patient injects, into the venous system, a polar molecule that, when placed in a test-tube with isolated protein kinase A, completely inhibits the activity of protein kinase A predict the respiratory and cardiovascular effects.(physiologic effects)
I predicted the respiratory effects to be: bronchoconstriction and the cardiovascular system effects to be:lowered heart rate, decreased contractility, and vasodiltion.
I'm worried that because the molecule is polar, target cells can't respond to the molecule?(since beta receptors require epinephrine?) which is correct?
What if the molecule were polar cyclic AMP? Can receptors respond to that since its not epinephrine? I'm thinking it may not produce any effects at all. Someone set me straight on this.