Nokea
The nurse knows which of the following is true about immunity?
- A. Antibody-mediated defense occurs through the T-cell system
- B. Cellular immunity is mediated by antibodies produced by the B-cells
- C. Antibodies are produced by the B-cells
- D. Lymphocytes increase with an allergic response
Correct Answer: C
Rationale: Rationale for Answer C: Antibodies are produced by the B-cells. B-cells are a type of lymphocyte that differentiate into plasma cells, which are responsible for producing antibodies in response to antigens. This process is a key component of the humoral immune response. Therefore, the statement that antibodies are produced by the B-cells is true.
Summary of Incorrect Choices:
A: Antibody-mediated defense occurs through the B-cell system, not the T-cell system. T-cells are involved in cell-mediated immunity.
B: Cellular immunity is mediated by T-cells, not antibodies produced by B-cells.
D: Lymphocytes increasing with an allergic response is not directly related to the production of antibodies by B-cells. Allergic responses involve a different mechanism.
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A patient is admitted to a medical unit with a diagnosis of heart failure. The patient reports that she has had increasing fatigue during the past 2 weeks. Which of the following is the most likely cause of this fatigue?
- A. Dyspnea
- B. Decreased cardiac output
- C. Dry cough
- D. Orthopnea
Correct Answer: B
Rationale: The correct answer is B: Decreased cardiac output. Fatigue in heart failure is primarily due to decreased cardiac output, leading to reduced oxygen and nutrient delivery to tissues, causing fatigue. Dyspnea (A) is shortness of breath, not fatigue. Dry cough (C) is more associated with conditions like pulmonary issues, not fatigue. Orthopnea (D) is difficulty breathing while lying down, not specifically related to fatigue. Hence, decreased cardiac output is the most likely cause of fatigue in this patient.
The nurse is using critical thinking skills during the first phase of the nursing process. Which action indicates the nurse is in the first phase?
- A. Completes a comprehensive database
- B. Identifies pertinent nursing diagnoses
- C. Intervenes based on priorities of patient care
- D. Determines whether outcomes have been achieved
Correct Answer: A
Rationale: The correct answer is A because the first phase of the nursing process is assessment, where the nurse gathers comprehensive data about the patient's health status. This step is crucial in identifying problems and setting priorities for care. Choice B comes in the second phase (diagnosis), C in the third phase (planning), and D in the last phase (evaluation). Assessing the patient's condition is the foundation for the rest of the nursing process.
A brain abscess is a collection of pus within the substance of the brain and is caused by:
- A. Direct invasion of the brain
- B. Spread of infection by other organs
- C. Spread infection from nearby sites
- D. All of the above mechanisms
Correct Answer: D
Rationale: The correct answer is D because a brain abscess can be caused by direct invasion of the brain, spread of infection by other organs, and spread of infection from nearby sites. Direct invasion occurs when bacteria enter the brain tissue directly, such as through trauma or surgery. Infections from other organs, like the lungs or heart, can spread through the bloodstream to the brain. Infections from nearby sites, such as the ears or sinuses, can also spread to the brain. Therefore, all of these mechanisms can lead to the formation of a brain abscess. Choices A, B, and C individually do not cover all the possible causes of a brain abscess, making D the correct choice.
A client has malignant lymphoma. As part of her chemotherapy, the physician prescribes chlorambucil (Leukeran), 10mg by mouth daily. When caring for the client, the nurse teaches her about adverse reactions to chlorambucil, such as alopecia. How soon after the first administration of chorambucil might this reaction occur?
- A. Immediately
- B. 2 to 3 weeks
- C. 1 week
- D. 1 month
Correct Answer: B
Rationale: The correct answer is B: 2 to 3 weeks. Alopecia is a common adverse reaction to chlorambucil, a type of chemotherapy drug that can cause hair loss. Alopecia typically occurs around 2 to 3 weeks after the first administration of chlorambucil. This is because chemotherapy drugs affect rapidly dividing cells, including hair follicles. Hair loss is a well-known side effect of many chemotherapy drugs, and it is important for the nurse to educate the client about this potential side effect.
Incorrect choices:
A: Immediately - Hair loss does not occur immediately after the first administration of chlorambucil.
C: 1 week - Hair loss typically occurs later than 1 week after starting chemotherapy.
D: 1 month - While hair loss can occur within a month, it is more likely to happen sooner, around 2 to 3 weeks after starting the medication.
The nurse is caring for a patient with HIV who has diarrhea. Which of the following would be most therapeutic to teach the patient to avoid in the diet to reduce diarrhea?
- A. Potassium-rich food
- B. Liquid nutritional supplements
- C. Raw fruits and vegetables
- D. Frozen products
Correct Answer: C
Rationale: The correct answer is C: Raw fruits and vegetables. Patients with HIV and diarrhea should avoid raw fruits and vegetables due to their high fiber content, which can exacerbate diarrhea symptoms. Fiber can increase bowel movements and worsen diarrhea. Therefore, avoiding raw fruits and vegetables can help reduce diarrhea.
Choice A (Potassium-rich food) is not the best answer because potassium-rich foods are important for patients with HIV to maintain electrolyte balance. Choice B (Liquid nutritional supplements) can actually be beneficial in providing essential nutrients to patients with HIV. Choice D (Frozen products) is not directly related to diarrhea management in patients with HIV.