Nokea
Which of the following statements accurately describes the role of natural killer (NK) cells in the immune response?
- A. NK cells directly kill virus-infected cells and tumor cells.
- B. NK cells produce antibodies against pathogens.
- C. NK cells present antigens to T cells to initiate adaptive immunity.
- D. NK cells release cytokines to recruit other immune cells to the site of infection.
Correct Answer: A
Rationale: Natural killer (NK) cells play a vital role in the innate immune response by identifying and eliminating virus-infected cells, as well as tumor cells, without the need for prior exposure or activation. NK cells are able to detect abnormal cells by recognizing changes in the cell surface molecules, such as downregulation of MHC class I molecules. Once activated, NK cells release cytotoxic granules containing perforin and granzyme, leading to the destruction of the target cell. This direct killing mechanism is crucial for controlling viral infections and preventing the development of tumors. NK cells do not produce antibodies (option B), present antigens to T cells (option C), or release cytokines to recruit other immune cells (option D) as their primary function in the immune response.
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A client with end-stage renal disease decides against further treatment and requests a "Do Not Resuscitate" (DNR) order. The DNR status is part of the change-of-shift report. The client stops breathing and a nurse begins cardiopulmonary resuscitation. The family is upset and makes a complaint to the charge nurse. The charge nurse appropriately identifies that nurse has committed:
- A. Defamation
- B. assault
- C. battery .
- D. fraud.
Correct Answer: C
Rationale: Battery occurs when there is an intentional touching of another person without their consent. In this case, the nurse began cardiopulintary resuscitation on a client who had requested a "Do Not Resuscitate" (DNR) order, which means the client did not consent to the resuscitation. This action can be considered as battery because the client's wishes were not respected, and the nurse proceeded with a medical intervention against those wishes, leading to harm and potential legal consequences. This is different from assault, which involves a threat of force, and from defamation and fraud, which are not applicable to this situation.
A nurse is preparing to assist with a cardiopulmonary exercise stress test for a patient. What action should the nurse prioritize to ensure patient safety during the test?
- A. Administering a beta-blocker medication to the patient before the test
- B. Monitoring the patient's electrocardiogram (ECG) rhythm continuously during the test
- C. Encouraging the patient to consume a heavy meal two hours before the test
- D. Allowing the patient to resume normal activities immediately after the test
Correct Answer: B
Rationale: The most critical action to prioritize for ensuring patient safety during a cardiopulmonary exercise stress test is to monitor the patient's electrocardiogram (ECG) rhythm continuously during the test (Option B). This monitoring allows the healthcare team to promptly detect any abnormal heart rhythms or signs of cardiac distress, enabling timely intervention if necessary. Continuous ECG monitoring is essential during exercise testing as it helps in assessing the heart's response to physical activity and identifying any potential cardiac abnormalities or complications that may arise during the test. By closely monitoring the ECG rhythm, the nurse can ensure the patient's safety and well-being throughout the procedure. Administering a beta-blocker medication before the test (Option A) may be indicated in some cases but is not as crucial as continuous ECG monitoring during the test. Encouraging the patient to consume a heavy meal before the test (Option C) is contraindicated as it can interfere with the accuracy of the results
What specific term should Nurse Gladys write in her charting when a patient is suffering from a change in the angle between the nail base greater than 180 degrees due to congenital heart disease?
- A. Peripheral neuropathy
- B. Inflammation of the fingers
- C. Peripheral cyanosis
- D. Clubbing of the fingers
Correct Answer: D
Rationale: Clubbing of the fingers is a specific term that Nurse Gladys should write in her charting when a patient is suffering from a change in the angle between the nail base greater than 180 degrees due to congenital heart disease. Clubbing of the fingers is a diagnostic sign associated with various medical conditions, including congenital heart disease. It is characterized by changes in the angle and shape of the nails, typically involving softening of the nail bed, enlargement of the fingertips, and a loss of the normal angle between the nail and the nail bed. Peripheral neuropathy, inflammation of the fingers, and peripheral cyanosis are different conditions and do not specifically describe the nail changes seen in clubbing.
Which of the following conditions is characterized by the presence of abnormal cervical cells that are classified as low-grade squamous intraepithelial lesions (LSIL) on cytology?
- A. Cervical cancer
- B. Cervical intraepithelial neoplasia (CIN)
- C. Cervical polyps
- D. Cervicitis
Correct Answer: B
Rationale: Cervical intraepithelial neoplasia (CIN) is a precancerous condition of the cervix characterized by the presence of abnormal cells on the surface of the cervix. These abnormal cells are often classified as low-grade squamous intraepithelial lesions (LSIL) on cytology. CIN is not yet cervical cancer but can progress to invasive cancer if left untreated. LSIL is indicative of mild dysplasia or cervical intraepithelial neoplasia 1 (CIN 1), which is considered a precancerous lesion. Therefore, the presence of abnormal cervical cells classified as LSIL is more likely to be associated with CIN rather than cervical cancer, cervicitis, or cervical polyps.
In collecting sputum specimen, the nurse should instruct Roy to _____.
- A. breathe slowly, cough and expectorate into the specimen container
- B. breathe deeply and cough, expectorate into the sputum container,
- C. cough and expectorate saliva into the specimen container.
- D. cough and expectorate into the specimen container.
Correct Answer: A
Rationale: In collecting a sputum specimen, the nurse should instruct Roy to breathe slowly, cough, and then expectorate into the specimen container. This ensures that the sputum sample is collected from the lower respiratory tract where it is most likely to contain pathogens or other relevant substances for analysis. By instructing Roy to breathe slowly, it helps him to take deep breaths and effectively cough to produce a good sputum sample. Additionally, asking him to expectorate directly into the specimen container helps prevent contamination from saliva or other sources, ensuring the accuracy of the specimen collected for testing.