What woul happen if hemoglobin were present freely in plasma?

If hemoglobin were present freely in plasma, it could lead to several complications, including hypertension and impaired oxygen delivery to tissues. Hemoglobin in the bloodstream would not be able to effectively transport oxygen, as it normally does within red blood cells, leading to potential oxygen deprivation in organs. Additionally, free hemoglobin could cause kidney damage and trigger inflammatory responses. Overall, the presence of free hemoglobin in plasma would disrupt normal physiological processes and could be life-threatening.