NCLEX-RN
NCLEX RN Exam Preview Answers
1. Which of the following descriptions best describes the function of the thyroid gland?
- A. The thyroid gland converts glucose into glycogen
- B. The thyroid gland secretes cortisol during times of stress
- C. The thyroid gland regulates body metabolism
- D. The thyroid gland affects skin pigmentation
Correct answer: C
Rationale: The thyroid gland is responsible for secreting thyroxine (T4) and triiodothyronine (T3), which work to regulate the metabolism of the body's cells. The primary function of the thyroid gland is to control the body's metabolic rate, affecting processes such as heart rate, temperature regulation, and energy levels. Choices A, B, and D are incorrect because the thyroid gland is not involved in converting glucose into glycogen, secreting cortisol, or affecting skin pigmentation. Instead, the primary role of the thyroid gland is to regulate the metabolism and energy balance in the body.
2. A client has died approximately one hour ago. The nurse notes that the client's temperature has decreased in the last hour since their death. Which of the following processes explains this phenomenon?
- A. Rigor mortis
- B. Postmortem decomposition
- C. Algor mortis
- D. Livor mortis
Correct answer: C
Rationale: Algor mortis occurs after death when the body's circulation stops, and the client's temperature begins to fall. The client's temperature will drop by approximately 1.8 degrees per hour until it reaches room temperature. During algor mortis, the client's skin gradually loses its elasticity. Rigor mortis refers to the stiffening of the body after death due to chemical changes in the muscles. Postmortem decomposition is the breakdown of tissues after death. Livor mortis is the pooling of blood in the dependent parts of the body, causing a purple-red discoloration.
3. Which of the following is the most likely cause of constipation in a client?
- A. Postponing bowel movement when the urge to defecate occurs
- B. Intestinal infection
- C. Antibiotic use
- D. Food allergies
Correct answer: A
Rationale: The correct answer is to postpone bowel movement when the urge to defecate occurs. Clients who delay bowel movements by ignoring the urge to defecate or not evacuating promptly, such as in situations where they are not near a bathroom, are at higher risk of developing constipation. This behavior leads to a decrease in bowel movement frequency, slowed intestinal motility, and increased fecal water absorption, resulting in hard, dry stools that are difficult to pass. Intestinal infection (choice B), antibiotic use (choice C), and food allergies (choice D) are less likely to be direct causes of constipation compared to postponing bowel movements.
4. What is the first aid for frostbite?
- A. Running cold water over the affected area. Warm or hot water will shock the area and cause more tissue damage.
- B. Run warm water over the area to rapidly rewarm the affected area.
- C. Run hot water over the area to warm the area as quickly as possible.
- D. Cover the area with a blanket, using a heating pad if the blanket isn't warm enough.
Correct answer: A
Rationale: First aid for frostbite involves running cold water over the affected area. It is important to avoid warm or hot water as it can shock the area and cause further tissue damage. Warm water should not be used to rapidly rewarm the affected area. Similarly, hot water should also be avoided as it can warm the area too quickly and potentially cause harm. Covering the area with a blanket and using a heating pad may not be effective and can even lead to more damage. Seeking medical assistance is crucial if the tissue appears necrotic to prevent further complications.
5. The Atlas and the Axis are:
- A. found in the vertebrae.
- B. described as being cervical.
- C. the first two bones that form the column for the spine on the superior aspect.
- D. All of the above.
Correct answer: D
Rationale: The Atlas and the Axis are the first two cervical vertebrae, designated as C1 and C2. The Atlas (C1) supports the skull, while the Axis (C2) allows for rotation of the skull. Therefore, all the statements in choices A, B, and C are correct, making 'All of the above' the correct answer. Choice A is correct as the Atlas and Axis are indeed found in the vertebrae. Choice B is correct as they are the first two cervical vertebrae. Choice C is correct as these bones form the superior aspect of the spine.
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