Which of these images best illustrates changes in lung function caused by acute asthma? Choose from the following: (A) (1) (B) (2) (C) (3)

With the Bohr effect, more oxygen is released because a(n)____. a) increase in pH(alkalosis) strengthens the hemoglobin-oxygen bond b) increase in pH(alkalosis) weakens the hemoglobin-oxygen bond c) decrease in pH (acidosis) weakens the hemoglobin-oxygen bond d) decrease in pH (acidosis) strengthens the hemoglobin-oxygen bond

Both the elastic property of the lung and the air :water interface contribute to the overall recoil of the lung. What are the relative contributions of the elastic property and the air: water interface to the recoil of the lung? A)both contribute equally to the recoil of the lung. B)the elastic tissue contributes ~33% to the recoil of the lung. C)the air:water interface contributes ~33% to the recoil of the lung. D)the elastic tissue contributes ~67% to the recoil of the lung. E)the air:water interface contributes ~90% to the recoil of the lung.   With respect to LaPlace's Law, the amount of pressure needed to keep alveoli open when surfactant is missing will be A)increased B)decreased C)stay the same E)all of the above

Question 4 Explain all the steps involved in “positive cooperativity”, enabling oxygen binding to hemoglobin.

In the absence of 2,3-bisphosphoglycerate, the binding of oxygen by hemoglobin:   a. is characterized by cooperativity   b. resembles that of myoglobin   c. binds at the end of the hemoglobin molecule   d. is stabilized as the deoxy conformation of hemoglobin for the release into capillaries