(三)血管和血压Vessel and blood pressure Therapeutic dose-no significant effect 原因：多数血管缺乏胆碱能神经支配 Larger dose-dilate cutaneous vessel,warm and flush 机理：不明，与（一）MR无关 possible reason: l)atropine→secretion of sweat gland↓→T个-→ 代偿性散热反应 2)atropine->dilate the blood vessel directlyTherapeutic dose -no significant effect 原因：多数血管缺乏胆碱能神经支配 （三）血管和血压 Vessel and blood pressure Larger dose- dilate cutaneous vessel，warm and flush 机理：不明 ，与（－）MR无关 possible reason： 1) atropine → secretion of sweat gland  → T  → 代偿性散热反应 2) atropine → dilate the blood vessel directly