Nokea
Regarding cough receptors:
- A. There is increased sensitivity in viral infections
- B. ~2-agonists decrease the sensitivity of cough receptors
- C. Exercise can stimulate the cough receptors in asthmatics
- D. They are predominantly seen in the large airways
Correct Answer: A
Rationale: Cough receptor sensitivity increases during viral infections, leading to heightened cough reflex.
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Which therapeutic management should the nurse expect to implement for a child with rheumatic fever?
- A. Administering penicillin
- B. Avoiding salicylates (aspirin)
- C. Imposing strict bed rest for 4 to 6 weeks
- D. Administering corticosteroids if chorea develops
Correct Answer: A
Rationale: The goal of medical management is the eradication of the hemolytic streptococci. Penicillin is the drug of choice. Salicylates can be used to control the inflammatory process, especially in the joints, and reduce the fever and discomfort. Bed rest is recommended for the acute febrile stage, but it does not need to be strict. The chorea is transient and will resolve without treatment.
In the electrocardiogram of a 40-year old male, the QRS amplitude in lead I and aVF measured (+) 10 and (-)10mV respectively. The frontal QRS axis is
- A. (+) 15°
- B. (-) 45°
- C. (-) 75°
- D. (-) 90°
Correct Answer: B
Rationale: The frontal QRS axis is (-) 45° given the QRS amplitudes in leads I and aVF.
A male client who reports feeling chronically fatigued has a hemoglobin of 11.0 grams/dl (110mmol/L), hematocrit of 34%, and microcytic and hypochromic red blood cells (RBCs). Based on these findings, which dinner selection should the nurse suggest to the client?
- A. Cheese pasta and a lettuce and tomato salad
- B. Beef steak with steamed broccoli and orange slices
- C. Broiled white fish with a baked sweet potato
- D. Grilled shrimp and season rice with asparagus salad
Correct Answer: B
Rationale: The client's lab results indicate iron deficiency anemia. Beef steak is rich in iron, and vitamin C from orange slices enhances iron absorption, making this the best choice to address the anemia.
Isovolumic contraction phase of ventricular systole occurs during which of the following phases of central venous pressure, approximately
- A. From nadir of y descent to peak of a wave
- B. From peak of a wave to trough of x wave
- C. From trough of x wave to peak of c wave
- D. From peak of c wave to trough of x' descent
Correct Answer: C
Rationale: Isovolumic contraction occurs from the trough of the x wave to the peak of the c wave.
In normal neonates:
- A. Extracellular fluid volume exceeds intracellular fluid volume
- B. In a term baby, plasma calcium levels exceed that of the mother
- C. Clamping the umbilical cord after cessation of cord pulsations increases the blood volume by 20% in the baby
- D. There are two arteries and one vein in the umbilical cord
Correct Answer: A
Rationale: In neonates, extracellular fluid volume is greater than intracellular fluid volume, reflecting the transition from intrauterine to extrauterine life.