Question

When a mammal exercises, oxygen delivery is increased by

a. increased blood flow.
b. the extraction of more O2 per unit volume.
c. increased blood flow and the extraction of more O2 per unit volume.
d. increased blood flow, the extraction of more O2 per unit volume, and a lowering of resistance in the systemic vasculature.

Answer 1

When a mammal exercises, oxygen delivery is increased by increased blood flow, the extraction of more O2 per unit volume, and a lowering of resistance in the systemic vasculature.

Step-by-step explanation:

When a mammal exercises, oxygen delivery is increased by increased blood flow, the extraction of more O2 per unit volume, and a lowering of resistance in the systemic vasculature. During exercise, blood flow to the working muscles increases to deliver more oxygen and nutrients. Additionally, the extraction of oxygen from the blood by the muscles is enhanced, and there is a decrease in resistance to blood flow in the blood vessels.