Physiology An arteriole with a damaged endothelial cell layer will not: A Constrict when intravascular pressure is increased B Dilate when adenosine is applied to the vessel wall C Constrict in response to norepinephrine D Dilate in response to adenosine diphosphate (ADP) or acetylcholine 💡 Explanation An arteriole with a damaged endothelial cell layer will not: ✓ Correct Answer: D. Dilate in response to adenosine diphosphate (ADP) or acetylcholine