Which laboratory test, when elevated, indicates an increased risk for the development of coronary artery disease?
Creatine kinase level
Homocysteine level
Serum high-density lipoproteins (HDL)
Serum potassium
The Correct Answer is B
A. Creatine kinase is an enzyme released when muscle tissue is damaged, often used in diagnosing muscle injuries or heart attacks, not coronary artery disease risk.
B. Elevated homocysteine levels are associated with an increased risk for coronary artery disease as it can damage the blood vessel walls and promote clot formation.
C. High levels of serum high-density lipoproteins (HDL) are protective against coronary artery disease, not a risk factor.
D. Serum potassium is important for cardiovascular health, but it does not directly correlate with coronary artery disease risk.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. In post-streptococcal glomerulonephritis, the immune response to strep infection results in inflammatory changes in the glomeruli, making the capillaries "leaky." This allows protein and red blood cells to pass into the urine, causing proteinuria and hematuria.
B. Post-streptococcal glomerulonephritis is not characterized by an autoantibody attack on the renal artery. It is primarily an immune-mediated inflammatory response in the glomeruli.
C. While casts may appear in the urine, the primary issue is glomerular capillary inflammation and permeability rather than direct leaking of casts.
D. Post-streptococcal glomerulonephritis typically results in a decreased GFR due to inflammation and reduced kidney function, not an increase.
Correct Answer is A
Explanation
A. ACE inhibitors block the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor in the RAAS, which leads to decreased blood pressure by promoting vasodilation.
B. The RAAS is primarily a vasoconstrictive system, and ACE inhibitors reduce this vasoconstriction, not vasodilation.
C. ACE inhibitors do not directly affect the inotropic (force of contraction) effects of the SNS; they work on the RAAS.
D. While natriuretic peptides help regulate fluid balance, ACE inhibitors do not directly impact this system.
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