Exam 37: Gas Exchange Transport

Hemoglobin is a quaternary protein consisting of four tertiary polypeptide chains.

The symbol HbNCOOH- is used for:

The presence of hemoglobin in the blood approximately doubles the oxygen-carrying capacity of plasma alone.

Which of the following helps determine the amount of oxygen that diffuses into the blood each minute?

Explain the process by which carbon dioxide is transported by the blood.

Blood is distributed through the capillaries in a layer so thin that each red blood cell comes in contact with the alveolar-capillary membrane.

The PCO₂ in alveolar air is _____ blood.

Carbonic acid forms when carbon dioxide reacts with water in the blood plasma.

The approximate partial pressure of oxygen at standard atmospheric pressure is about _____ mm Hg.

The partial pressure of oxygen in the alveolar air is equal to the partial pressure of oxygen in the systemic venous blood.

An increase in carbon dioxide would have the opposite effect on oxygen-hemoglobin dissociation than would a drop in blood pH.