A body function that may be affected by a deficiency of vitamin C is:

synthesis of intrinsic factor.

Wound healing

bowel elimination.

urine formation.

Answer and Explanation

The Correct Answer is B

A. synthesis of intrinsic factor: Vitamin C does not play a role in the production of intrinsic factor, which is a protein needed for vitamin B12 absorption. Deficiency of vitamin C would not impair this process.

B. Wound healing: Vitamin C is essential for collagen synthesis, which is crucial for tissue repair and wound healing. A deficiency can result in delayed healing, easy bruising, and poor connective tissue integrity. Monitoring for slow recovery from injuries can indicate inadequate vitamin C intake.

C. bowel elimination: Vitamin C does not directly regulate bowel movements, although high doses may have a mild laxative effect. Deficiency does not typically cause significant changes in bowel elimination.

D. urine formation: Vitamin C is water-soluble and excreted in urine, but it does not affect kidney function or the process of urine formation. Deficiency does not impair renal filtration or fluid balance.

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Correct Answer is C

Explanation

A. Albuterol: The patient has already used a short-acting beta-2 agonist, so repeating albuterol may provide some relief but is unlikely to be sufficient for an acute exacerbation with persistent tachypnea and hypoxia. Additional interventions targeting severe airway inflammation may be required.

B. Theophylline: Theophylline is a bronchodilator used for long-term asthma management, not for immediate relief in acute severe exacerbations. Its slow onset and narrow therapeutic range make it inappropriate for emergency treatment in this scenario.

C. Epinephrine: Epinephrine is indicated in severe acute asthma or anaphylactic reactions when rapid bronchodilation is needed. It works on alpha and beta receptors to reduce airway edema, relax bronchial smooth muscle, and improve oxygenation. In the ER, epinephrine provides fast-acting relief for life-threatening airway obstruction.

D. Dexamethasone: Dexamethasone is a corticosteroid that reduces airway inflammation but has a delayed onset of action. While important for sustained management, it does not provide immediate relief for acute shortness of breath or hypoxia and is typically given alongside fast-acting agents.

A. Complete Blood Count B. Creatinine C. Serum Sodium and Potassium D. Serum Albumin

Correct Answer is B

Explanation

A. Complete Blood Count: A CBC evaluates red and white blood cells and platelets, which are not direct indicators of kidney function. While anemia can develop in chronic kidney disease, CBC changes are secondary and do not provide immediate information about renal clearance.

B. Creatinine: Serum creatinine is a primary marker of kidney function because it reflects the kidneys’ ability to filter waste products. Elevated levels indicate impaired glomerular filtration rate (GFR) and help guide medication dosing and fluid management in older adults.

C. Serum Sodium and Potassium: Electrolytes can be affected by kidney impairment, but changes often occur after kidney function declines significantly. While important to monitor for complications such as hyperkalemia or hyponatremia, these values are not as sensitive as creatinine for detecting early decreases in renal function.

D. Serum Albumin: Albumin measures protein status and nutritional health rather than kidney filtration ability. Low levels may be seen in nephrotic syndrome but are not a reliable indicator of general kidney function.

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A body function that may be affected by a deficiency of vitamin C is:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A patient comes to the ER with complaints of shortness of breath, wheezing, a O2 saturation of 92%, respiratory rate of 28, and heart rate of 110. The patient did take a short acting beta 2 agonist prior to coming to the ER. Which drug will the nurses anticipate

Correct Answer is C

Explanation

The nurse is caring for an older adult patient with a decrease in kidney function. Which of the following laboratory values should the nurse monitor?

Correct Answer is B

Explanation

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