### Cardiovascular Physiology: Blood Pressure

#### Laboratory Simulation

Question 1: Why does blood pressure increase with exercise and then lower after 5 minutes?

A. Blood pressure increases during exercise due to the greater pull of gravity.

B. Increased blood pressure helps to ensure muscle tissue has an adequate blood supply during exercise. When exercise is over, the oxygen demand decreases.

C. During exercise, skeletal muscle contracts around the blood vessels. Greater blood pressure is needed to move blood through the narrower vessels. Blood pressure decreases after exercise because the vessels are no longer being squeezed.

Question 2: What do you predict would happen to a person's blood pressure when they go from standing to lying down?

A. Blood pressure would increase in the lying down position.

B. Blood pressure would decrease in the lying down position.

C. Blood pressure would stay the same.

Blood pressure increases during exercise to meet the body's oxygen demand for muscles and decreases after exercise; transitioning from standing to lying down may result in a decrease in blood pressure.

Explanation:

During exercise, blood pressure increases to ensure muscles receive adequate blood supply due to increased cardiac output, where the heart pumps more blood. This rise is necessary as skeletal muscles contract around blood vessels, requiring higher pressure to move blood through narrower vessels. After exercise, blood pressure lowers as vessels stop being constricted.

When transitioning from standing to lying down, blood pressure commonly decreases. In a lying down position, the heart doesn't need to work as hard against gravity, leading to a potential lowering of blood pressure.

Learn more about Blood Pressure Regulation here:

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