Physiological response to smoking, are all, except: (A) Decreased HDL, (B) Increased hematocrit, (C) Increased hea rate and increased catecholamine release, (D) Decreased carboxyhemoglobin
Answer is D. Carboxyhemoglobin increases in smokers Ref: guyton and hall textbook of medical physiology 12 edition page number:353,354,355