GENERAL ANATOMY
CARDIOVASCULAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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increased fluid, decreased cardiac output, and decreased pressure
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increased fluid, decreased cardiac output, and increased pressure
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increased fluid, increased cardiac output, and decreased pressure
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increased fluid, increased cardiac output, and increased pressure
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Detailed explanation-1: -How Blood Volume Affects Blood Pressure. Changes in blood volume affect arterial pressure by changing cardiac output. An increase in blood volume increases central venous pressure. This increases right atrial pressure, right ventricular end-diastolic pressure and volume.
Detailed explanation-2: -Blood pressure increases with increased cardiac output, peripheral vascular resistance, volume of blood, viscosity of blood and rigidity of vessel walls. Blood pressure decreases with decreased cardiac output, peripheral vascular resistance, volume of blood, viscosity of blood and elasticity of vessel walls.
Detailed explanation-3: -Any increase in cardiac output will, in turn, increase blood pressure and thus promote blood flow.
Detailed explanation-4: -Therefore, a large blood volume at rest is an important factor for achieving a high cardiac output during exercise and blood volume shifts compensate for the decrease in peripheral oxygen saturation, thereby maintaining a high arteriovenous oxygen difference.
Detailed explanation-5: -Cardiac output as you know is made up of heart rate and stroke volume. At rest these are relatively constant however with exercise the heart beats faster and more blood is pumped out with each beat. These factors both contribute to a rise in BP, as would any other factor that caused the heart to speed up.