Final answer:
It is true that the more hemoglobin in the blood, the greater its oxygen-carrying capacity. Hemoglobin binds oxygen molecules and transports them throughout the body, contributing significantly to the efficient delivery of oxygen to tissues.
Step-by-step explanation:
The statement that the more hemoglobin you have, the better the carrying capacity of O₂ in blood is true. Hemoglobin is a protein found inside red blood cells, consisting of four subunits each with an iron-containing heme group that can bind to oxygen. Therefore, an increase in the concentration of hemoglobin enables more oxygen to be transported in the blood. It is crucial to note that although carbon dioxide can bind to hemoglobin, oxygen has a stronger affinity for hemoglobin, which allows oxygen to displace carbon dioxide when necessary. Conditions such as increased carbon dioxide levels, variances in blood pH, and body temperature, however, can affect the oxygen-carrying capacity of hemoglobin.
Learn more about Hemoglobin and Oxygen Carrying Capacity