All of the following statements are true except
a. 2,3-bisphosphoglycerate decreases the affinity of hemoglobin for oxygen.
b. hemoglobin will bind more oxygen when the partial pressure is low than when the partial pressure is high.
c. oxygen dissociates more readily from hemoglobin as ph decreases.
d. increased partial pressure of carbon dioxide increases oxygen dissociation from hemoglobin.
e. decreasing temperature will cause a shift to the left in the hemoglobin saturation curve.

Option (2).

Explanation:

Hemoglobin may be defined as red color pigment present in the red blood cells. The main function of hemoglobin is the transport of oxygen molecules in the body.

Various factors can affect the binding of oxygen with hemoglobin. The higher the partial pressure of oxygen, more oxygen will bind to the hemoglobin and transport faster in the blood. Low partial pressure decreases the binding affinity of oxygen with hemoglobin. All other factors mentioned in the questions are correct.

Thus, the correct answer is option (b).

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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