Practice question
Question
Endothelial cells release NO upon stimulation by acetylcholine or serotonin, leading to vascular smooth muscle relaxation. NO is rapidly inactivated by hemoglobin. Which statements are correct?
Explanation
C and D, is consistent with established principles of cell signaling, receptor pharmacology and cellular regulation. Experimental measurements of binding parameters, genetic loss-of-function studies and pharmacological interventions all converge on the same interpretation. Related options address neighboring concepts but do not satisfy the precise criterion stated in the question.