SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Active transport
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Diffusion
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Osmosis
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None of the options
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Detailed explanation-1: -Oxygen diffuses through the cell membrane and is transported in blood plasma by free diffusion and by convection.
Detailed explanation-2: -Hemoglobin (Hgb or Hb) is the primary carrier of oxygen in humans. Approximately 98% of total oxygen transported in the blood is bound to hemoglobin, while only 2% is dissolved directly in plasma.
Detailed explanation-3: -The oxygen enters the bloodstream from the alveoli, tiny sacs in the lungs where gas exchange takes place (Figure below). The transfer of oxygen into the blood is through simple diffusion.
Detailed explanation-4: -Oxygen travels throughout marine environments thanks to simple diffusion. Oxygen usually forms a bond with a second oxygen molecule and travels as O2. These small molecules can form hydrogen bonds and are also small enough to diffuse directly through cell membranes.