Final answer:
Pulse pressure increases during dynamic exercise due to the body's response to increased cardiac output. The heart beats faster and the blood vessels relax, resulting in increased blood pumped and an increase in pulse pressure.
Step-by-step explanation:
During dynamic exercise, pulse pressure increases due to the body's response to increased cardiac output.
Cardiac output is the volume of blood pumped by the heart in one minute, and it can be increased by increasing heart rate or stroke volume. When exercising, the heart beats faster (increased heart rate) to pump more blood into the aorta per minute, and the blood vessels relax and increase in diameter (vasodilation) to allow more blood to enter the heart between contractions. These changes result in increased cardiac output and therefore an increase in pulse pressure.
When pulse pressure increases during dynamic exercise, it indicates that the heart is working harder to pump more blood and meet the increased demands of the body during physical activity.