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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
Most oxygen transported in human blood _______.
- a. is bound to hemoglobin
- b. combines with carbon to form carbon dioxide
- c. is in the form of bicarbonate
- d. is dissolved in the plasma
Concept introduction: Hemoglobin has four globin subunits. The four globin subunits have an iron containing heme group that can bind one molecule of oxygen. When the oxygen is bound to one or more heme groups, the molecule is known as oxyhemoglobin.
Reasons for the correct answer: The inhaled air reaches the alveoli that has a higher partial pressure of oxygen than the blood in pulmonary capillaries. Due to this, the oxygen tends to diffuse from air to blood of these capillaries. The oxygen that enters the blood diffuses into red blood cells and binds to hemoglobin.
Option a. is given as “is bound to hemoglobin”. As the oxygen transported in human blood is bound to hemoglobin, option a. is correct.
Reasons for incorrect answers:
Option b. is given as “combines with carbon to form carbon dioxide”.
Carbon dioxide diffuses from the body cell into plasma and then into red blood cells...
Chapter 38 Solutions
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