D027 Advanced Pathopharmacological Foundations - Set 5 - Part 2

Correct Answer: Hypocalcemia

Hypocalcemia from hypoparathyroidism causes neuromuscular irritability producing muscle cramps and positive Chvostek sign.
Option a is incorrect because hypercalcemia causes weakness and confusion, not tetany and Chvostek sign.
Option c is incorrect because hyperkalemia affects cardiac conduction more than neuromuscular irritability signs.
Option d is incorrect because hypokalemia causes weakness and cramps but not Chvostek sign specifically.

Correct Answer: Hospitalized patients

Hospitalized patients with severe influenza benefit from antivirals regardless of symptom duration due to severity.
Option a is incorrect because healthy adults benefit mainly within forty-eight hours of symptom onset.
Option c is incorrect because adolescents follow standard timing guidelines unless severely ill.
Option d is incorrect because preschool children need antivirals within standard timing unless hospitalized.

Correct Answer: Glycosaminoglycan deposition

Glycosaminoglycan deposition in dermis causes pretibial myxedema's characteristic non-pitting edema and skin thickening.
Option a is incorrect because simple fluid retention causes pitting edema, not the firm myxedema.
Option c is incorrect because infection causes cellulitis with different appearance than myxedema.
Option d is incorrect because allergic reactions cause urticaria or dermatitis, not myxedema changes.

Correct Answer: Gabapentinoids

Gabapentin and pregabalin modulate calcium channels reducing excitatory neurotransmitter release and neuropathic pain signals.
Option a is incorrect because NSAIDs target inflammation, not the nerve signal dysfunction in neuropathy.
Option c is incorrect because opioids work through different receptors with limited neuropathic pain efficacy.
Option d is incorrect because steroids reduce inflammation but don't modulate neuropathic pain signals directly.

Correct Answer: Cardiovascular system

Cardiovascular disease from accelerated atherosclerosis causes death by teenage years in progeria patients.
Option a is incorrect because respiratory failure isn't the primary cause of death in progeria.
Option c is incorrect because renal failure doesn't typically cause death in progeria patients.
Option d is incorrect because hepatic failure isn't characteristic of progeria's aging pattern.

Correct Answer: Daily inspection

Daily foot inspection identifies problems early before they progress to infections requiring amputation.
Option a is incorrect because soaking macerates skin increasing infection risk in diabetic feet.
Option c is incorrect because heating pads risk burns in neuropathic feet with decreased sensation.
Option d is incorrect because going barefoot risks injury in feet with decreased protective sensation.

Correct Answer: Pheochromocytoma

Multiple endocrine neoplasia with medullary thyroid cancer requires pheochromocytoma screening due to syndrome association.
Option a is incorrect because breast cancer isn't part of multiple endocrine neoplasia syndromes.
Option c is incorrect because lymphoma doesn't associate with MEN syndromes including medullary thyroid cancer.
Option d is incorrect because melanoma isn't part of the MEN syndrome cancer spectrum.

Correct Answer: Vitamin E

Vitamin E deficiency causes spinocerebellar degeneration with ataxia that improves with supplementation therapy.
Option a is incorrect because vitamin A deficiency affects vision, not cerebellar function causing ataxia.
Option c is incorrect because vitamin K deficiency affects coagulation, not neurological coordination.
Option d is incorrect because vitamin C deficiency causes scurvy, not the ataxia described.

Correct Answer: Buspirone

Buspirone specifically treats anxiety through serotonin receptor partial agonism without antidepressant effects or dependence risk.
Option b is incorrect because bupropion is an antidepressant that may worsen anxiety in some patients.
Option c is incorrect because mirtazapine is an antidepressant with sedating properties, not anxiety-specific.
Option d is incorrect because trazodone is an antidepressant used off-label for sleep, not anxiety.

Correct Answer: Protein content

Protein content differentiates transudates from exudates using Light's criteria, guiding treatment toward underlying cause.
Option a is incorrect because color doesn't reliably distinguish transudate from exudate fluid types.
Option c is incorrect because volume doesn't determine fluid type; both can be large or small.
Option d is incorrect because location doesn't indicate fluid type; both occur on either side.

Correct Answer: Gate control theory

Spinal stimulation activates gate control mechanism where non-painful signals block pain transmission to brain.
Option a is incorrect because stimulation doesn't destroy nerves; it modulates signal transmission electrically.
Option c is incorrect because spinal stimulators deliver electrical signals, not medications for pain.
Option d is incorrect because stimulation affects pain signals, not directly causing muscle relaxation.

Correct Answer: CT scan

CT scan definitively shows fluid density of blood versus air density, accurately distinguishing hemothorax from pneumothorax.
Option a is incorrect because chest X-ray may not clearly differentiate fluid from air in all cases.
Option c is incorrect because ultrasound has limitations visualizing through air-filled lung tissue.
Option d is incorrect because MRI isn't routinely used for acute chest trauma evaluation.

Correct Answer: Prostaglandin E1

Prostaglandin E1 keeps ductus arteriosus open, maintaining systemic circulation until surgical repair in hypoplastic left heart.
Option a is incorrect because indomethacin closes the ductus, which would be fatal in this condition.
Option c is incorrect because aspirin doesn't maintain ductal patency needed for survival.
Option d is incorrect because heparin prevents clotting but doesn't keep the ductus open.

Correct Answer: Prolonged exposure therapy

Prolonged exposure therapy involves repeated trauma discussion and imaginal exposure reducing avoidance and emotional reactivity.
Option a is incorrect because cognitive therapy focuses on thought patterns, not repeated trauma exposure.
Option c is incorrect because medications treat symptoms but don't involve trauma discussion therapy.
Option d is incorrect because group therapy provides support but isn't specifically prolonged exposure technique.

Correct Answer: Negative symptoms

Negative symptoms include alogia and social withdrawal, representing deficits in normal function requiring different treatment.
Option a is incorrect because positive symptoms are hallucinations and delusions, not the deficits described.
Option c is incorrect because cognitive symptoms affect memory and attention, not speech and social function.
Option d is incorrect because mood symptoms are secondary; these are primary negative symptoms.

Correct Answer: African Americans

G6PD deficiency affects African Americans most frequently, with prevalence justifying screening in this population.
Option a is incorrect because Northern Europeans have low G6PD deficiency prevalence not requiring routine screening.
Option c is incorrect because Native Americans don't have the high prevalence seen in African populations.
Option d is incorrect because Eastern Europeans have lower prevalence than African-descended populations.

Correct Answer: Terminal ileum

Terminal ileum absorbs vitamin B12; Crohn's disease affecting this area causes B12 deficiency anemia.
Option a is incorrect because duodenum absorbs iron and folate, not vitamin B12 specifically.
Option b is incorrect because jejunum absorbs most nutrients but not B12, which requires terminal ileum.
Option d is incorrect because sigmoid colon doesn't participate in B12 absorption affected by Crohn's.

Correct Answer: Recent hospitalization

Recent hospitalization risks resistant organisms requiring broader empiric coverage beyond typical community-acquired pneumonia antibiotics.
Option a is incorrect because young age doesn't specifically require broader antibiotic coverage.
Option c is incorrect because gender doesn't determine antibiotic resistance requiring broader coverage.
Option d is incorrect because urban residence alone doesn't indicate resistant organism risk.

Correct Answer: Pilot

Pilots must distinguish colored signals and lights for aviation safety, requiring normal color vision.
Option a is incorrect because accounting doesn't require color discrimination for job performance.
Option c is incorrect because teaching accommodations allow color blind individuals to work effectively.
Option d is incorrect because legal work doesn't require color vision for professional practice.

Correct Answer: Fever

Fever indicates upper urinary tract involvement in pyelonephritis, while cystitis typically presents without fever.
Option a is incorrect because dysuria occurs with both cystitis and pyelonephritis infections.
Option c is incorrect because frequency occurs with lower and upper urinary tract infections.
Option d is incorrect because urgency characterizes both cystitis and pyelonephritis presentations.