HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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same as that in the aorta.
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more than that in the carotid.
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more than that in the pulmonary vein.
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less than that in the venae cavae.
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Detailed explanation-1: -The blood in the pulmonary arteries is pumped by the right ventricle of the heart. Pulmonary veins carry oxygenated blood from the lungs back to the heart and enter the left atrium. Since the blood in the pulmonary arteries is pumped by the heart, it flows under greater pressure than the blood in the pulmonary veins.
Detailed explanation-2: -Aorta and carotid arteries are a part of the systemic circulation and the blood pressure in them is higher than the pulmonary artery.
Detailed explanation-3: -Pulmonary blood pressure is normally a lot lower than systemic blood pressure. Normal pulmonary artery pressure is 8-20 mm Hg at rest. If the pressure in the pulmonary artery is greater than 25 mm Hg at rest or 30 mmHg during physical activity, it is abnormally high and is called pulmonary hypertension.
Detailed explanation-4: -Pulmonary hypertension is a type of high blood pressure that affects the arteries in the lungs and the right side of the heart. In one form of pulmonary hypertension, called pulmonary arterial hypertension (PAH), blood vessels in the lungs are narrowed, blocked or destroyed.
Detailed explanation-5: -The pressure is greatest when blood is pumped out of the heart into the arteries. When the heart relaxes between beats (blood is not moving out of the heart), the pressure falls in the arteries. Two numbers are recorded when measuring blood pressure.