D027 Advanced Pathopharmacological Foundations - Set 1 - Part 2

Correct Answer: Thirty beats increase

POTS diagnosis requires heart rate increase exceeding thirty beats per minute within ten minutes of standing without orthostatic hypotension.
Option a is incorrect because ten beats increase represents normal physiological response to position change, not POTS criteria.
Option b is incorrect because twenty beats increase falls below the diagnostic threshold for postural orthostatic tachycardia syndrome.
Option d is incorrect because forty beats increase is the pediatric criterion; adults require only thirty beats increase.

Correct Answer: Both b and c

Color blindness passes from carrier mothers to sons and from affected fathers to carrier daughters through X-linked inheritance.
Option a is incorrect because fathers cannot pass X-linked conditions to sons since sons receive Y chromosome from fathers.
Option b is incorrect alone because it doesn't include the complete inheritance pattern involving carrier daughters from affected fathers.
Option c is incorrect alone because it doesn't include the mother-to-son transmission pattern common in X-linked conditions.

Correct Answer: Antidepressants

Antidepressants like amitriptyline effectively treat neuropathic pain by modulating pain signal transmission in the nervous system.
Option a is incorrect because opioids are less effective for neuropathic pain and carry addiction risks with chronic use.
Option c is incorrect because muscle relaxants target muscle spasms, not the nerve dysfunction causing neuropathic pain symptoms.
Option d is incorrect because corticosteroids reduce inflammation but don't address the nerve signal dysfunction in neuropathic pain.

Correct Answer: ARB medications

Combining ACE inhibitors with ARBs increases hyperkalemia and kidney dysfunction risks, making this combination contraindicated in CKD.
Option a is incorrect because beta blockers can be safely combined with ACE inhibitors for blood pressure control.
Option b is incorrect because calcium channel blockers like amlodipine safely combine with ACE inhibitors in CKD management.
Option d is incorrect because thiazide diuretics can be used with ACE inhibitors, though monitoring kidney function is important.

Correct Answer: Dystonia

Dystonia involves continuous spasms and muscle contractions, a common extrapyramidal side effect of first-generation antipsychotics.
Option b is incorrect because akathisia presents as restlessness and inability to sit still, not continuous muscle spasms.
Option c is incorrect because bradykinesia involves slowing of movement, not the muscle spasms characteristic of dystonia.
Option d is incorrect because tardive dyskinesia causes irregular jerky movements of face and extremities, not continuous spasms.

Correct Answer: Meperidine

Meperidine effectively treats rigors associated with transfusion reactions and should be given first for this specific symptom.
Option a is incorrect because acetaminophen helps with fever but doesn't specifically address the rigors requiring immediate treatment.
Option b is incorrect because diphenhydramine treats allergic symptoms but isn't first-line for rigors in transfusion reactions.
Option d is incorrect because prednisone reduces inflammation but doesn't provide immediate relief for rigors during transfusions.

Correct Answer: Propylthiouracil

Propylthiouracil uniquely inhibits both thyroid hormone synthesis and peripheral conversion, making it preferred for thyroid storm treatment.
Option a is incorrect because methimazole only blocks synthesis without inhibiting peripheral conversion like propylthiouracil does.
Option c is incorrect because levothyroxine is thyroid replacement therapy used for hypothyroidism, not hyperthyroidism treatment.
Option d is incorrect because liothyronine is synthetic thyroid hormone that would worsen hyperthyroidism, not treat it.

Correct Answer: Nystatin topical

Nystatin applied topically to mouth and tongue multiple times daily safely and effectively treats infant oral thrush.
Option a is incorrect because fluconazole injection is unnecessarily invasive when topical treatment effectively manages infant thrush.
Option c is incorrect because griseofulvin treats dermatophyte infections, not the Candida albicans causing oral thrush.
Option d is incorrect because terbinafine cream treats skin fungal infections, not oral candidiasis requiring oral cavity application.

Correct Answer: Forty to forty-nine

Preserved ejection fraction heart failure occurs with ejection fractions between forty and forty-nine percent, indicating diastolic dysfunction.
Option a is incorrect because twenty to thirty percent represents severely reduced ejection fraction indicating systolic heart failure.
Option b is incorrect because thirty to forty percent still indicates reduced ejection fraction with systolic dysfunction present.
Option d is incorrect because fifty to sixty percent falls within normal ejection fraction range, not heart failure territory.

Correct Answer: Clonazepam

Clonazepam's longer half-life provides sustained anxiety control with less frequent dosing, making it first-line for GAD management.
Option a is incorrect because alprazolam's short half-life requires frequent dosing and carries higher dependence risk than clonazepam.
Option c is incorrect because lorazepam's intermediate half-life makes it better for acute anxiety than long-term management.
Option d is incorrect because diazepam's active metabolites can accumulate, though clonazepam offers more predictable long-term control.

Correct Answer: Wide-based gait

Wide-based gait is characteristic of cerebellar ataxia, helping maintain balance when coordination is impaired by cerebellar damage.
Option a is incorrect because resting tremor characterizes Parkinson's disease, not the intention tremor seen in cerebellar ataxia.
Option c is incorrect because pill-rolling movements are specific to Parkinson's disease, not cerebellar dysfunction causing ataxia.
Option d is incorrect because mask-like facial expression occurs in Parkinson's disease, not in cerebellar ataxia presentations.

Correct Answer: Glargine insulin

Glargine insulin has no peak action and provides steady twenty-four hour coverage, ideal for basal insulin needs.
Option a is incorrect because regular insulin peaks at two to four hours, not providing peakless basal coverage.
Option b is incorrect because NPH insulin peaks at four to twelve hours, lacking the flat profile of glargine.
Option d is incorrect because lispro is rapid-acting insulin peaking at thirty to ninety minutes for mealtime coverage.

Correct Answer: Greater accuracy

Rapid molecular assays detect viral genetic material providing greater accuracy than RIDTs that detect antigens with more false results.
Option a is incorrect because molecular assays typically cost more than simpler rapid influenza diagnostic test methods.
Option c is incorrect because both tests provide results within fifteen to twenty minutes, with similar turnaround times.
Option d is incorrect because both tests use similar nasal swab collection methods with comparable ease of administration.

Correct Answer: Innermost lining only

Ulcerative colitis affects only the innermost lining of the large intestine, unlike Crohn's transmural inflammation pattern.
Option a is incorrect because transmural inflammation affecting all intestinal wall layers characterizes Crohn's disease, not ulcerative colitis.
Option c is incorrect because serosal involvement occurs in Crohn's disease penetrating through all layers, not ulcerative colitis.
Option d is incorrect because muscular layer involvement indicates deeper inflammation than ulcerative colitis's superficial mucosal pattern.

Correct Answer: Dullness

Hemothorax produces dullness to percussion due to blood accumulation, contrasting with pneumothorax's hyperresonant percussion sounds.
Option a is incorrect because hyperresonance indicates air accumulation as in pneumothorax, not blood-filled hemothorax.
Option c is incorrect because normal resonance suggests healthy lung tissue without pleural space abnormalities like hemothorax.
Option d is incorrect because tympany indicates hollow air-filled structures, not the fluid density of hemothorax.

Correct Answer: INR level

Doxycycline enhances warfarin's anticoagulant effect, requiring INR monitoring to prevent dangerous bleeding complications from this interaction.
Option a is incorrect because platelet count isn't directly affected by the doxycycline-warfarin interaction requiring INR monitoring.
Option c is incorrect because hemoglobin monitoring checks for bleeding but INR predicts risk from the drug interaction.
Option d is incorrect because white blood cell count monitoring doesn't relate to the anticoagulant interaction between these medications.

Correct Answer: Aplastic crisis

Aplastic crisis causes sudden pallor, weakness, and dropping hemoglobin from temporary cessation of red blood cell production.
Option a is incorrect because vaso-occlusive crisis primarily causes pain from vessel blockage, not the sudden anemia described.
Option c is incorrect because sequestration crisis involves painful spleen enlargement with trapped blood cells, not production failure.
Option d is incorrect because hemolytic crisis involves increased red cell destruction with jaundice, not production cessation symptoms.

Correct Answer: Prazosin

Prazosin specifically reduces PTSD-associated nightmares by blocking noradrenergic activity disrupting traumatic dream content during sleep.
Option a is incorrect because sertraline treats overall PTSD symptoms but doesn't specifically target nightmare reduction like prazosin.
Option c is incorrect because propranolol may help performance anxiety but doesn't specifically address PTSD nightmare symptoms.
Option d is incorrect because buspirone treats general anxiety without the specific nightmare-reducing properties of prazosin.

Correct Answer: Hyponatremia

Small cell lung cancer commonly causes SIADH leading to hyponatremia, a characteristic paraneoplastic syndrome of this cancer.
Option a is incorrect because hyperkalemia isn't a typical paraneoplastic syndrome associated with small cell lung cancer.
Option c is incorrect because hyperphosphatemia doesn't represent a common paraneoplastic manifestation of small cell lung cancer.
Option d is incorrect because hypomagnesemia isn't characteristic of the hormonal imbalances seen with small cell lung cancer.

Correct Answer: High TPO antibodies

Hashimoto's thyroiditis shows elevated thyroid peroxidase antibodies indicating autoimmune thyroid destruction causing the hypothyroidism.
Option a is incorrect because low TSH indicates hyperthyroidism; hypothyroidism shows high TSH from inadequate thyroid hormone.
Option c is incorrect because low T3 occurs in various hypothyroid states, not specifically indicating Hashimoto's thyroiditis.
Option d is incorrect because high calcitonin indicates medullary thyroid cancer, not the autoimmune process of Hashimoto's.