In reduced form hemoglobin carries:
Correct answer: C. Hydrogen ion
- A. CO2
- B. O2
- C. Hydrogen ion
- D. CO
Explanation
Reduced hemoglobin (deoxyhemoglobin) contains four heme groups, each with a ferrous (Fe2+) ion capable of binding and transporting oxygen. Oxidation (removal of an electron) of iron to the ferric (Fe3+) state produces methemoglobin.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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