Which acid-base mechanism would the kidney use to buffer a patient's acidosis (serum pH <7.35)? Select all that apply.
One, some, or all responses may be correct.
Eliminating excess H+.
Excreting excess water.
Eliminating excess CO2.
Reabsorbing additional HCO3-.
Reabsorbing additional sodium ions.
Correct Answer : A,D
Choice A rationale:
Eliminating excess H+ ions (hydrogen ions) is a primary mechanism the kidneys use to buffer acidosis. In acidosis, there is an excess of hydrogen ions in the body, leading to a decrease in pH. The kidneys help regulate the body's pH by excreting hydrogen ions to lower acidity.
Choice B rationale:
Excreting excess water is not a specific acid-base mechanism related to acidosis. While maintaining proper hydration is important for overall health, it does not directly influence the body's acid-base balance in the context of acidosis.
Choice C rationale:
Eliminating excess CO2 is primarily a respiratory mechanism, not a kidney function. CO2 elimination is more related to the lungs' ability to regulate the body's pH by adjusting respiratory rate and depth.
Choice D rationale:
Reabsorbing additional HCO3- ions (bicarbonate ions) is a renal mechanism to buffer acidosis. Bicarbonate ions act as a base and can neutralize excess hydrogen ions, raising the pH of the body fluids.
Choice E rationale:
Reabsorbing additional sodium ions is not a specific acid-base mechanism related to acidosis. While sodium ions are important for various physiological processes, they do not play a direct role in buffering acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["C","B"]
Explanation
Choice A rationale:
Anemia is not a direct manifestation of target organ damage from hypertension.
Choice B rationale:
Aneurysm is a correct answer. Persistent high blood pressure can weaken the walls of arteries, making them more susceptible to forming an aneurysm. Aneurysms can occur in various arteries, such as the aorta, and can lead to life-threatening complications if they rupture.
Choice C rationale:
Proteinuria is also a correct answer. Hypertension can damage the kidneys, leading to proteinuria, the presence of excess proteins in the urine. This is an indication of kidney damage and is a common manifestation of hypertensive target organ disease.
Choice D rationale:
Pneumonia and Transient Ischemic Attack (TIA) are not direct manifestations of target organ damage from hypertension.
Correct Answer is C
Explanation
Choice A rationale:
Serotonin is a neurotransmitter that plays a role in mood regulation, sleep, and other functions in the body. It is not a component that forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process.
Choice B rationale:
Platelet factor III is not a component that forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process. Platelet factor III is not widely recognized in the context of clotting; it is more commonly referred to as tissue factor and is involved in the extrinsic pathway of coagulation.
Choice C rationale:
Von Willebrand factor (VWF) is a protein that plays a crucial role in hemostasis. It forms an adhesive bridge between platelets and vascular subendothelial structures, particularly at sites of vascular injury. VWF helps platelets adhere to the injured vessel wall, leading to the formation of a stable blood clot. This process is essential for preventing excessive bleeding. A deficiency or dysfunction in VWF can lead to von Willebrand disease, a bleeding disorder characterized by prolonged bleeding times.
Choice D rationale:
Adenosine diphosphate (ADP) is a molecule released by platelets when they are activated. ADP helps in the aggregation of platelets, but it does not directly form an adhesive bridge between platelets and vascular subendothelial structures.
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