"Which of the following statements about the interactions between the circulatory and respiratory systems is/are true? Select all that apply.
During exercise, the heart pumps faster and the demand for oxygen decreases.
Blood flows from the right side of the heart to the body, then to the left side of the heart and then to to lungs.
The ability of oxygen to be carried in the blood is largely mediated by the presence of the protein hemoglobin.
The interactions between alveoli and capillaries allow for gas exchange to occur."