Which process leads to the development of a hypertensive crisis?
Activation of platelets
Activation of coagulation mediators
Activation of the renin-angiotensin system
Activation of rapid cell proliferation
The Correct Answer is C
The renin-angiotensin system (RAS) is a hormonal system that regulates blood pressure and fluid balance. When blood pressure is low, the kidneys secrete renin, which converts angiotensinogen into angiotensin I, which is then converted into angiotensin II by angiotensin-converting enzyme (ACE). Angiotensin II is a potent vasoconstrictor that narrows blood vessels and increases blood pressure. It also stimulates the release of aldosterone, which increases sodium and water retention and further raises blood pressure. When the RAS is overactivated, it can lead to a hypertensive crisis, which is a severe elevation of blood pressure that can damage organs and cause stroke, heart attack, or kidney failure.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Cellulitis is a bacterial infection of the deep layers of the skin and subcutaneous tissue that causes redness, swelling, warmth, and pain in the affected area. It can occur as a complication of a lymphatic blockage because lymphedema (swelling due to impaired lymphatic drainage) can impair the skin's barrier function and make it more susceptible to infection.
Correct Answer is D
Explanation
Hemodialysis is a type of dialysis that uses an external machine (an artificial kidney) to filter the blood of waste and excess fluid. Hemodialysis requires access to a large blood vessel, usually through an arteriovenous fistula or graft in the arm or leg.
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