what occurs finally in blood capillaries of tissues. a.hco+h^+=h2co3. b.h2co3=H2O+co2. c.co2+h20=h2co3 d.hb+o2=hbo2
Answers
Answer: There are three means by which carbon dioxide is transported in the bloodstream from peripheral tissues and back to the lungs: (1) dissolved gas, (2) bicarbonate, and (3) carbaminohemoglobin bound to hemoglobin (and other proteins). As carbon dioxide diffuses into the bloodstream from peripheral tissues, approximately 10% of it remains dissolved either in plasma or the blood's extracellular fluid matrix, to a partial pressure of about 45 mmHg.[2] Most of the carbon dioxide diffusing through the capillaries and ultimately into the red blood cells combines with water via a chemical reaction catalyzed by the enzyme carbonic anhydrase catalyzes, forming carbonic acid. Carbonic acid almost immediately dissociates into a bicarbonate anion (HCO3-) and a proton. Thus, bicarbonate is the primary means by which carbon dioxide is transport occurs throughout the bloodstream according to the equation CO2 + H2O --> H2CO3 --> H+ + HCO3-.
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