Which phrase describes the function of a buffer?

To excrete weak acids.

To secrete hydrogen ions.

To convert strong acids to weak acids.

To convert ammonia to ammonium ions.

Answer and Explanation

The Correct Answer is C

Choice A rationale:

Buffers do not excrete weak acids; instead, they help regulate the pH of bodily fluids by preventing drastic changes in acidity or alkalinity.

Choice B rationale:

Buffers do not secrete hydrogen ions. In fact, buffers can either absorb or release hydrogen ions to maintain a stable pH.

Choice C rationale:

To convert strong acids to weak acids is the correct answer. Buffers are substances that can neutralize both acids and bases, helping to maintain a stable pH in a solution. They achieve this by accepting hydrogen ions from strong acids or donating hydrogen ions to strong bases, converting them into weaker acids or bases, respectively.

Choice D rationale:

Buffers do not convert ammonia to ammonium ions. This conversion is a part of the body's acid-base regulation system, but it is not the primary function of buffers.

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Correct Answer is C

Explanation

Choice A rationale:

Enteric-coated iron is designed to be absorbed in the small intestine, not the stomach. Taking it with each meal might decrease its absorption due to interaction with food.

Choice B rationale:

Cobalamin (vitamin B12) deficiency can cause macrocytic anemia, not microcytic hypochromic anemia. Taking cobalamin with green, leafy vegetables does not address the specific iron deficiency seen in microcytic hypochromic anemia.

Choice C rationale:

Take the iron with orange juice 1 hour before meals is the correct answer. Vitamin C enhances the absorption of non-heme iron (the type of iron found in plant-based foods and iron supplements) by reducing it to a more absorbable form. Taking iron supplements with orange juice, which is high in vitamin C, can significantly improve iron absorption. Taking it before meals ensures better absorption due to reduced interaction with other dietary components.

Choice D rationale:

Decreasing the intake of antiseizure medications will not improve microcytic hypochromic anemia. Antiseizure medications do not directly influence iron absorption or the production of red blood cells.

A. Maximizing cardiac output. B. Maintaining ideal body weight. C. Performing daily aerobic exercises. D. Maintaining a steady pulse oximetry reading.

Correct Answer is A

Explanation

Choice A rationale:

Maximizing cardiac output is a primary goal for patients with chronic heart failure (HF) because it helps improve tissue perfusion and oxygen delivery to meet the body's demands. It is a crucial aspect of managing heart failure and preventing further complications.

Choice B rationale:

Maintaining ideal body weight is important for overall health but is not a primary goal specific to chronic heart failure management.

Choice C rationale:

While exercise is beneficial for heart failure patients, it needs to be tailored to the patient's condition. Performing aerobic exercises daily might not be suitable for all heart failure patients and is not a primary goal.

Choice D rationale:

Maintaining a steady pulse oximetry reading is important, but it is a measure of oxygen saturation in the blood and not a primary goal for managing chronic heart failure.

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Which phrase describes the function of a buffer?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Which instruction would the nurse include in the teaching plan for a patient newly diagnosed with microcytic hypochromic anemia?

Correct Answer is C

Explanation

Which goal is a primary objective for a patient who has chronic heart failure (HF)?

Correct Answer is A

Explanation

Which phrase describes the function of a buffer?

A patient's blood pressure (BP) reading is 142/91 mm Hg. How would the nurse classify the BP?

The nurse receives a health care provider's prescription to change a patient's IV from D5. half-normal saline with 40 mEq KCl/L to DSNS with 20 mEq KCl/L. Which set of serum laboratory values supports the rationale for this IV prescription change?

Which laboratory report finding would support the nurse's conclusion that a patient has thalassemia major? Select all that apply.One, some, or all responses may be correct.

The nurse notes that a patient has a smooth and shiny tongue surface.The nurse would attribute these findings to which condition?

The nurse is teaching a patient about the administration of liquid iron supplements. Which response by the patient indicates the need for additional teaching?

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After noting that a patient with leukemia has thrombocytopenia, which action will the nurse plan to take?