Fetal Hemoglobin Has a Greater Affinity for Oxygen Than Adult

question 15

Multiple Choice

Fetal hemoglobin has a greater affinity for oxygen than adult hemoglobin because:

• A)the fetus does not have its own oxygen supply and must rely on oxygen from the maternal vascular system.
• B)the fetus has two γ-chains on the hemoglobin, rather than two ß-chains as in the adult.
• C)fetal hemoglobin interacts less readily with DPG, which inhibits hemoglobin-oxygen binding.
• D)fetal hemoglobin production occurs in the vessels and liver rather than in the bone marrow as in the adult.

---

Definitions:

Proportional Income Tax

A taxation system where the tax rate remains constant regardless of the amount of income earned.

Market Income

The income received by an individual or household through trade and investment within the marketplace, excluding government transfers.

Quintile

A statistical value that divides a set of data into five equal parts, each representing 20% of the distributed population.

Unemployment Benefits

Payments made by authorized bodies to unemployed people, intended to provide a temporary source of income while they seek new employment.