Nursing Elites

1. What is the function of the enzyme lactase in the digestive system?

• A. Breaks down lactose into glucose and galactose
• B. Breaks down proteins into amino acids
• C. Converts starch into maltose
• D. Breaks down fats into fatty acids

Correct answer: A

Rationale: The correct answer is A: 'Breaks down lactose into glucose and galactose.' Lactase is an enzyme in the small intestine that specifically breaks down lactose, the sugar found in milk, into glucose and galactose for absorption. Choice B is incorrect because proteins are broken down into amino acids by protease enzymes. Choice C is incorrect because the enzyme amylase converts starch into maltose. Choice D is incorrect as lipase enzymes break down fats into fatty acids.

2. A client is recovering from a below-the-knee amputation (BKA). The client reports phantom limb pain. What should the nurse include in the client’s care plan to manage this type of pain?

• A. Apply heat to the residual limb.
• B. Administer prescribed analgesics.
• C. Elevate the residual limb.
• D. Perform range-of-motion exercises.

Correct answer: B

Rationale: Phantom limb pain is a type of pain that feels like it's coming from a body part that's no longer there. It is essential to understand that phantom limb pain is real and should be managed appropriately. Administering prescribed analgesics is the most effective way to address this discomfort. Applying heat, elevating the residual limb, and performing range-of-motion exercises are not effective in managing phantom limb pain since the pain originates from the brain expecting sensory input from the missing limb, rather than being related to physical factors that heat, elevation, or exercises can address.

3. A client with a prescription for a transcutaneous electrical nerve stimulator (TENS) unit for pain management asks how it works. What information should the nurse reinforce?

• A. The discharge of electricity will distract the client's focus from the pain
• B. An infusion of medication in the spinal canal will block pain perception
• C. Pain perception in the cerebral cortex is dulled by the unit's discharge of an electrical stimulus
• D. A mild electrical stimulus on the skin surface closes the gates of nerve conduction for severe pain

Correct answer: D

Rationale: The correct answer is D. TENS works by delivering a mild electrical stimulus that can block pain signals from reaching the brain, effectively reducing the perception of pain. Choice A is incorrect because TENS does not distract from pain but rather interferes with pain signals. Choice B is incorrect as TENS does not involve infusing medication into the spinal canal. Choice C is also incorrect because TENS does not target the cerebral cortex to dull pain perception but rather works at the level of nerve conduction.

4. Which electrolyte imbalance is most commonly associated with seizures?

• A. Hyponatremia
• B. Hypercalcemia
• C. Hyperkalemia
• D. Hypokalemia

Correct answer: A

Rationale: The correct answer is A: Hyponatremia. Hyponatremia, characterized by low sodium levels in the blood, can lead to cerebral edema and seizures due to water shifting into brain cells. Hypercalcemia (choice B) does not commonly cause seizures but can result in muscle weakness and cardiac arrhythmias. Hyperkalemia (choice C) may lead to muscle weakness and cardiac arrhythmias, but it is less frequently associated with seizures. Hypokalemia (choice D) is linked to muscle weakness and cardiac arrhythmias but is not typically related to seizures.

5. Based on the principle of asepsis, which situation should the nurse consider to be sterile?

• A. A one-inch border around the edges of a sterile field set up in the operating room
• B. A sterile glove that the nurse thinks might have touched her hair
• C. A wrapped, unopened sterile 4x4 gauze pad placed on a damp tabletop
• D. An open sterile Foley catheter kit set up on a table at the nurse's waist level

Correct answer: D

Rationale: The correct answer is D because an open sterile Foley catheter kit set up at waist level is considered sterile if it has not been contaminated. Choice A is incorrect because the one-inch border around a sterile field is considered non-sterile. Choice B is incorrect because a sterile glove that might have touched the nurse's hair is likely contaminated. Choice C is incorrect because a wrapped, unopened sterile gauze pad placed on a damp tabletop may have become contaminated.

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