★ Gaseous Exchange in Humans Quiz
A maximum of ___ oxygen molecules can be transported by one molecule of haemoglobin.
A. 1
B. 2
C. 3
D. 4
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Describe the nature of movement of oxygen within the blood and surrounding tissues
A. Moves down its electrochemical gradient
B. Moves down its partial pressure
C. Requires protein channels to diffuse across membranes
D. Moves out into the alveolar space from the capillaries
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