Adult Health Nursing Test Bank

Correct Answer: A

Rationale: The correct answer is A: Myasthenia gravis. In myasthenia gravis, there is a decrease in acetylcholine receptors at the neuromuscular junction, leading to muscle weakness and fatigue. This occurs due to autoimmune destruction of these receptors. ALS (B) affects motor neurons, not acetylcholine receptors. Guillain-Barre syndrome (C) is an autoimmune disorder affecting peripheral nerves, not neuromuscular junctions. Muscular dystrophy (D) is a genetic disorder causing muscle degeneration, not affecting acetylcholine receptors.

Correct Answer: B

Rationale: The correct answer is B: Relieves pain by increasing pain threshold. Meperidine and codeine are opioid analgesics that work by binding to opioid receptors in the brain and spinal cord, thus increasing the pain threshold and reducing the perception of pain. This leads to pain relief without necessarily affecting sexual stimulation (choice A), craving for alcohol (choice C), or concentration/alertness (choice D). The primary physiological effect of these drugs is to modulate the perception of pain, making choice B the most appropriate answer in this context.

Correct Answer: A

Rationale: The correct answer is A: Empiric antibiotic therapy directed against common pathogens. This is recommended for managing PID because it helps treat the infection and prevent complications. Antibiotics target the underlying bacterial infection causing PID. Surgical exploration (B) is not the initial treatment for PID. Hormonal therapy (C) is not indicated for PID management. Symptomatic treatment with NSAIDs (D) can help with pain but does not address the infection itself.

Correct Answer: D

Rationale: The correct answer is D: Breastfeeding. HIV transmission from mother to infant can occur through breast milk due to the presence of the virus in breast milk. Other choices such as A: Bathing, B: Bottlefeeding, and C: Washing of vagina do not involve direct contact with potentially infected body fluids like breast milk, making them less likely to transmit the virus. Breastfeeding is a well-documented mode of HIV transmission from mother to infant, hence it is the correct choice in this scenario.

Correct Answer: C

Rationale: The scenario described in the question is consistent with acute cholecystitis, which is inflammation of the gallbladder usually caused by an impacted gallstone in the cystic duct. The key clinical features of acute cholecystitis include fever, chills, right upper quadrant abdominal pain (which can be localized to the right upper quadrant), tenderness in the right upper abdomen, and a positive Murphy's sign (pain and inspiratory arrest upon palpation of the right upper quadrant). This condition is more common in pregnant women due to hormonal changes that can lead to gallstone formation and subsequent inflammation of the gallbladder. Ectopic pregnancy, pelvic inflammatory disease, and ovarian torsion typically present with different clinical features compared to those described in acute cholecystitis.