THE HUMAN IMMUNE SYSTEM
TRANSFUSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A constricted vessel with low blood pressure
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A constricted vessel with high blood pressure
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A dilated vessel with high blood pressure
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A dilated vessel with low blood pressure
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Detailed explanation-1: -Blood flow is slowest in the capillaries, which allows time for exchange of gases and nutrients. Resistance is a force that opposes the flow of a fluid. In blood vessels, most of the resistance is due to vessel diameter.
Detailed explanation-2: -In the general circulation, the highest blood pressure is found in the aorta and the lowest blood pressure is in the vena cava.
Detailed explanation-3: -In the aorta, the blood travels at 30 cm/sec. As blood moves into the arteries, arterioles, and ultimately to the capillary beds, the rate of movement slows dramatically to about 0.026 cm/sec, one-thousand times slower than the rate of movement in the aorta.
Detailed explanation-4: -Answer and Explanation: Blood pressure is lower in veins than capillaries, because there needs to be enough pressure in the capillaries to ensure the blood and oxygen is delivered to all the tissues and cells in the body.
Detailed explanation-5: -Blood capillaries are vessels that have smallest diameter, They are the smallest blood vessels of the body.