PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As Volume increases, Pressure increases as well.
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As Volume increases, Pressure decreases.
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As Volume decreases, Pressure increases.
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As Volume decreases, Pressure decreases as well.
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Detailed explanation-1: -The cardiovascular system combats low blood volume by constricting blood vessels until the body reaches a blood pressure that restores proper perfusion pressure. Blood volume and blood pressure are interconnected through the renal and circulatory system, specifically the renin-angiotensin-aldosterone system (RAAS).
Detailed explanation-2: -Similarly, as blood volume decreases, pressure and flow decrease. As blood volume increases, pressure and flow increase. Under normal circumstances, blood volume varies little.
Detailed explanation-3: -Decreases in blood volume: A decrease in blood volume can also cause blood pressure to drop. A significant loss of blood from major trauma, dehydration or severe internal bleeding reduces blood volume, leading to a severe drop in blood pressure.
Detailed explanation-4: -Blood volume is the direct link between hydration and blood pressure. Our kidneys regulate blood volume by adjusting the amount of water and salt filtered into urine. In a properly hydrated person, these levels stay within a relatively narrow range and blood volume doesn’t change much.