Which of the following cellular receptors is responsible for recognizing pathogen-associated molecular patterns (PAMPs) and initiating innate immune responses?

Correct Answer: A

Rationale: Toll-like receptors (TLRs) are a group of cellular receptors responsible for recognizing pathogen-associated molecular patterns (PAMPs), which are molecular components commonly found on pathogens like bacteria and viruses. When TLRs recognize these PAMPs, they initiate signaling pathways that trigger the innate immune response, leading to inflammation, antimicrobial defense, and the activation of adaptive immunity. B cell receptors (BCRs) and T cell receptors (TCRs) are involved in adaptive immune responses and recognize specific antigens rather than PAMPs. Fc receptors primarily bind to the Fc portion of antibodies and are involved in antibody-mediated immune responses. Thus, TLRs specifically play a critical role in sensing and responding to pathogens through the recognition of PAMPs.

Correct Answer: B

Rationale: Nurse Chona should explain to Patient Noel that the sign of negative before the word means that he is not drinking alcohol or smoking cigarettes. This is a simple misunderstanding and clarification should help clear up any confusion. It is important to uphold patient confidentiality and respect their autonomy, rather than reprimanding the patient for looking at their own chart. It is also essential to address any discrepancies in the patient's medical record to ensure accurate information is documented for proper treatment and care.

Correct Answer: C

Rationale: Persistent, severe abdominal pain, tenderness, and rigidity in a postpartum client can be indicative of serious conditions such as uterine rupture, hemorrhage, or infection, which require urgent medical attention. As a nurse, the priority action in this situation is to notify the healthcare provider immediately so that appropriate interventions can be initiated promptly to ensure the safety and well-being of the client. Administering analgesics or providing emotional support may not address the underlying cause of the symptoms and could potentially delay necessary medical treatment. Assisting the client to a comfortable position can be considered once the healthcare provider has been informed and appropriate assessments and interventions have been initiated.

Correct Answer: D

Rationale: The most common symptom of scabies that the family would report to Nurse Emma is itchiness. Scabies is a contagious skin condition caused by the Sarcoptes scabiei mite, which burrows into the skin and lays eggs, leading to intense itching, especially at night. The itching is a result of the body's allergic reaction to the mites and their waste products. While rashes, scaling, and swelling can also occur with scabies, the hallmark and most bothersome symptom experienced by individuals with scabies is the intense itchiness, making it the most common symptom reported by affected individuals or their families during the history-taking process.

Correct Answer: C

Rationale: Chest pain, dyspnea, hypotension, and ST-segment elevation on an ECG in the inferior leads are classic signs of an acute myocardial infarction (MI). An acute MI occurs when there is a sudden blockage of blood flow to a part of the heart muscle, leading to tissue damage. This causes symptoms such as chest pain due to ischemia, dyspnea due to heart failure, and hypotension due to poor cardiac output. The ST-segment elevation seen on the ECG is indicative of significant myocardial injury. Prompt diagnosis and management are crucial in acute MI to prevent further complications and to minimize damage to the heart muscle. It is important to differentiate an acute MI from stable or unstable angina or other cardiovascular disorders, as the management and prognosis vary significantly.

Correct Answer: B

Rationale: Supplying the patient with paper tissues to use when touching doorknobs is the most appropriate response in this situation. This action acknowledges and respects the patient's anxiety while providing a practical solution to help her cope. Forcing her to touch doorknobs or discouraging her concerns would not address the underlying anxiety and may lead to increased distress. Encouraging her to scrub doorknobs with a strong antiseptic is not necessary and may exacerbate her anxiety. Explaining that her concerns are part of her illness may invalidate her feelings and is not a constructive way to address the situation. Supplying her with paper tissues allows her to feel more comfortable while still being able to navigate her daily activities.

Correct Answer: C

Rationale: Nurse Minda should alert the unit staff to closely observe the fan because the occasional sparking may be a sign of an impending issue that could lead to a more serious problem. By closely monitoring the fan, the staff can ensure the safety of those in the unit and take necessary actions if the situation worsens. It is important to address potential safety hazards promptly to prevent any harm or damage.

Correct Answer: C

Rationale: The main source of nutrition for the baby during pregnancy is the placenta. The placenta is an organ that develops inside the uterus during pregnancy and provides essential nutrients and oxygen from the mother's blood to the baby through the umbilical cord. It acts as a barrier, protecting the baby from harmful substances while allowing necessary nutrients to pass through. The amniotic fluid serves as a protective cushion for the baby, the uterus provides the space for the baby to grow, and chorionic villi are small, hair-like structures on the placenta that aid in the exchange of nutrients and waste between the mother and the baby. However, the primary source of nutrition for the baby is the placenta, making option C the correct answer in this scenario.

Correct Answer: A

Rationale: The patient's presentation of episodic throbbing headache associated with nausea, vomiting, sensitivity to light and sound, and aura suggests a diagnosis of migraine headache. Migraines are a common neurological condition characterized by recurrent moderate to severe headaches that are often unilateral, pulsating, and aggravated by physical activity. The presence of premonitory symptoms (aura) before the headache is a key feature commonly seen in migraines. Additionally, nausea, vomiting, and sensitivity to light and sound are also common features associated with migraines.