Which of the Following Statements About O₂-Binding Curves Is False

question 28

Multiple Choice

Which of the following statements about O₂-binding curves is false?

• A) A smaller decrease in P_O2 is needed for hemoglobin to drop from 100 percent to 75 percent saturation than for hemoglobin to drop from 75 percent to 50 percent saturation.
• B) In normal metabolism, the body uses only the upper one-fourth of its oxygen-binding curve.
• C) The blood normally carries an enormous reserve of O₂.
• D) The steepest part of the O₂-binding curve results in a great release of O₂ for only a modest drop in P_O2.
• E) The P_O2 of blood drops below about 40 mm Hg only during extreme exertion.

---

Definitions:

Eye Contact

The act of looking directly into another person's eyes, which can convey a range of emotions and intentions.

Powerful

Having great power, strength, or influence.

Nonverbal Communication

The process of conveying a message without the use of words, which can include facial expressions, body language, and gestures.

Gestures

Movements of the body or limbs that express or emphasize ideas or feelings.