At rest, the _______ PO₂ in blood at the lungs allows hemoglobin to carry _______ O₂ molecules, but when the blood returns to the lungs, hemoglobin usually carries _______ O₂ molecules.

Question

Quizplus · Accepted Answer

At rest, the PO2 in blood at the lungs is high, allowing hemoglobin to carry four O2 molecules. When the blood returns to the lungs, hemoglobin usually carries three O2 molecules.

At Rest, the _______ PO2 in Blood at the Lungs

At Rest, the _______ PO₂ in Blood at the Lungs