Gas exchange — Flashcards

Flashcard 31: Both Hemoglobin H and hemoglobin Bart's have a strong affinity for oxygen, resulting in _____

Answer: tissue hypoxia

Flashcard 32: The lung diffusing capacity (DL) is the equivalent of _____ of the alveolar-pulmonary capillary barrier

Answer: permeability

Flashcard 33: The lung diffusing capacity, DL, is _____ proportional to the alveolar wall thickness

Answer: inversely

Flashcard 34: Fetal hemoglobin (HbF) has a much _____ binding affinity for O2 than adult hemoglobin (HbA)

Answer: higher

Flashcard 35: The ductal cells modify the initial pancreatic secretion via _____ of Cl-

Answer: absorption

Flashcard 36: What is the purpose of decreased maternal PCO2 during pregnancy? _____

Answer: Facilitate CO2 elimination from the fetus

Flashcard 37: In a healthy patient, can exercise alone make patients hypoxemic? _____

Answer: No

Flashcard 38: The alveolar gas equation states that the alveolar PO2 (PAO2) equals: _____

Answer: PIO2 - (PaCO2 / R)

Extra: Where: PIO2 = FiO2 (Patm - PH2O) R = respiratory quotient (typically 0.8) Note: PIO2 is the partial pressure of inspired oxygen. PaCO2 is the arterial CO2.

Flashcard 39: Carboxyhemoglobin heme groups not bound by CO have a(n) _____ affinity for O2

Answer: increased

Flashcard 40: 2,3-BPG decreases the affinity of hemoglobin for O2 by binding to hemoglobin _____ chains

Answer: β