Final answer:
The effectiveness of oxygen transport depends on factors like red blood cell mass, blood pH, and exercise, as all of these affect the oxygen-carrying capacity and delivery to tissues. The correct option is D.
Step-by-step explanation:
The effectiveness of oxygen transport depends on multiple factors. These include:
- A. Red blood cell mass - The number of erythrocytes containing hemoglobin to carry oxygen.
- B. pH - The acidity of blood affects hemoglobin's ability to bind oxygen; lower pH (more acidic) leads to reduced oxygen affinity.
- C. Exercise - Physical activity increases metabolic demands, leading to adjustments in oxygen delivery.
- D. All of the above - Together, these factors contribute to the body's ability to effectively transport oxygen to tissues.
Oxygen delivery is vital for cellular function and is influenced by the body's ability to carry hemoglobin within red blood cells. Changes in blood pH affect the oxygen-hemoglobin saturation/dissociation curve through the Bohr effect. Exercise alters the demand and supply of oxygen, enhancing oxygen transport mechanisms such as increasing erythrocyte production or ventilatory responses.