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Which of the following immune cells is primarily responsible for coordinating and regulating immune responses by producing cytokines that direct the activities of other immune cells?
- A. T helper cells (Th cells)
- B. Cytotoxic T cells (CTLs)
- C. B cells
- D. Natural killer (NK) cells
Correct Answer: A
Rationale: T helper cells (Th cells) are primarily responsible for coordinating and regulating immune responses by producing cytokines that direct the activities of other immune cells. These cytokines help in activating cytotoxic T cells, B cells, macrophages, and other cells involved in the immune response. Th cells play a crucial role in mounting an effective immune response against infections and diseases by providing the necessary signals to activate and control various immune cells. Thus, T helper cells are considered the central coordinators of the immune system.
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A patient with a history of deep vein thrombosis (DVT) is prescribed warfarin therapy. Which instruction is essential for the nurse to include in patient education about warfarin therapy?
- A. "Limit your intake of green leafy vegetables."
- B. "Avoid activities that may increase your risk of bleeding."
- C. "Take a double dose if you miss a dose to catch up."
- D. "Report any unusual bleeding or bruising to your healthcare provider."
Correct Answer: D
Rationale: It is essential for the nurse to instruct the patient to "Report any unusual bleeding or bruising to your healthcare provider." Warfarin is a medication that works by decreasing the clotting ability of the blood. This can increase the risk of bleeding, so it is important for the patient to be vigilant for any signs of abnormal bleeding. Prompt reporting of any unusual bleeding or bruising allows healthcare providers to adjust the dosage of warfarin to maintain a balance between preventing blood clots and minimizing the risk of bleeding complications. This instruction emphasizes the importance of close monitoring and communication with healthcare providers while on warfarin therapy.
An effective nursing intervention for the impulsive and aggressive behaviors that accompany conduct disorder is ______.
- A. open expression of feelings
- B. negotiation of rules
- C. assertiveness training
- D. consistent limit setting
Correct Answer: D
Rationale: Consistent limit setting is an effective nursing intervention for managing impulsive and aggressive behaviors in individuals with conduct disorder. By establishing clear and consistent boundaries, rules, and consequences, individuals with conduct disorder can learn self-control and appropriate behavior. Consistent limit setting provides structure and predictability, helping to reduce impulsive and aggressive reactions in these individuals. It also teaches them accountability for their actions and reinforces appropriate behavior. Additionally, setting limits helps to establish a sense of safety and security for both the individual and those around them. Therefore, consistent limit setting is a crucial intervention to help manage impulsive and aggressive behaviors associated with conduct disorder.
A patient presents with sudden-onset severe headache, nausea, vomiting, and photophobia. On examination, there is neck stiffness and positive Kernig and Brudzinski signs. Which of the following neurological conditions is most likely responsible for these symptoms?
- A. Meningitis
- B. Subdural hematoma
- C. Intracerebral hemorrhage
- D. Acute angle-closure glaucoma
Correct Answer: A
Rationale: The symptoms described - sudden-onset severe headache, nausea, vomiting, photophobia, neck stiffness, and positive Kernig and Brudzinski signs - are classic manifestations of meningitis. Meningitis is an inflammation of the meninges, the protective membranes covering the brain and spinal cord, often caused by infection. The sudden onset of these symptoms and signs, along with neck stiffness and positive Kernig and Brudzinski signs (indicative of meningeal irritation), strongly suggest meningitis as the most likely diagnosis in this scenario.
It a medicine is unavailable and therefore not given to the patient, how is it charted?
- A. Leave it blank.
- B. Sign and make an explanation in the Nurses Notes.
- C. With an asterisk or mark, as per hospital protocol.
- D. Write the letter.
Correct Answer: B
Rationale: When a medication is unavailable and therefore not given to the patient, it is important to document this in the Nurses Notes along with an explanation. Leaving it blank (Option A) may lead to confusion or errors as the reason for not administering the medication would not be clear. Using an asterisk or mark as per hospital protocol (Option C) may not provide enough information about why the medication was missed. Writing the letter (Option D) without any explanation would not suffice in terms of documentation and accountability. Therefore, signing and making an explanation in the Nurses Notes (Option B) is the correct way to chart when a medication is unavailable. This ensures proper documentation of the situation and helps in maintaining the continuity of care for the patient.
A patient presents with chest pain that occurs during emotional stress and resolves spontaneously. An electrocardiogram (ECG) may show transient ST-segment elevation. Which cardiovascular disorder is most likely responsible for these symptoms?
- A. Stable angina
- B. Unstable angina
- C. Acute myocardial infarction
- D. Takotsubo cardiomyopathy
Correct Answer: D
Rationale: Takotsubo cardiomyopathy, also known as stress-induced cardiomyopathy or broken heart syndrome, presents with symptoms similar to acute coronary syndrome, such as chest pain and ECG changes. In Takotsubo cardiomyopathy, chest pain typically occurs during emotional stress and resolves spontaneously, similar to the scenario described in the question. The ECG may show transient ST-segment elevation. This condition is characterized by a reversible left ventricular dysfunction that can mimic a myocardial infarction. Unlike stable angina (Choice A) and unstable angina (Choice B), Takotsubo cardiomyopathy is not related to coronary artery disease. Acute myocardial infarction (Choice C) typically presents with persistent ST-segment elevation on ECG and is caused by atherosclerotic plaque rupture leading to myocardial infarction, which is not consistent with the transient ST-segment elevation seen in