For the conversion of prothrombin to thrombin, which of the following is required?, Fibrinogen, Vitamin K, Proconvertin, Thrombokinase, Heparin, Thiopentone sodium (Pentothal) provides all of the following advantages EXCEPT?, Smooth pleasant induction, Good sleep production, Rapid recovery, Acceptability for both young and old, Adequate length of operating time, All of the following are possible effects of acetylsalicylic acid EXCEPT?, Suppression of inflammatory response, Shortening of bleeding time, Reduction of fever, Bleeding from the gastrointestinal tract, Inhibition of prostaglandin synthesis, Cardiovascular collapse caused by a high circulating dose of a local anesthetic is primarily due to?, Histamine release, Myocardial depression, Vagal stimulation, Medullary stimulation, Sympathetic chain blockade, A lingual nerve block will NOT anesthetize the?, Lingual gingivae, Posterior one-third of the tongue, Anterior two-thirds of the tongue, Parasympathetic fibers to the submandibular salivary gland, Floor of the mouth, For a patient with a history of glaucoma and porphyria, the pharmaco-sedation technique preferred is?, Intravenous diazepam, Nitrous oxide, Intravenous secobarbital, Intravenous thiopental, Oral secobarbital, Diffusion of local anesthetic molecules across the nerve sheath is facilitated by?, A tissue pH between 5.0 and 6.0, A tissue pH above 7.0, A tissue pH below 5.0, High hydrophilicity of the nerve fibers, Decreased tissue vascularity, After giving buccal infiltration anesthesia for the removal of a maxillary premolar, the patient complains of a sharp pain in the cheek which blanches immediately. This is a result of?, Stimulating sympathetic nerves around an artery, Injecting the solution too rapidly, Injecting too much solution, Direct intravenous injection, Direct mechanical injury to the facial nerve, Which of the following opioid analgesics has the highest liability for physical dependence and addiction?, Hydromorphone HCl, Morphine sulfate, Meperidine, Codeine, Oxycodone, Bradycardia is a clinical term that describes a resting heart rate of?, 81–100 per minute, Less than 60 per minute, 61–80 per minute, Over 100 per minute, 100–120 per minute, Which of the following drugs is used maintenance therapy in treating opioid-dependent individuals?, Alphaprodine, Methadone, Codeine, Meperidine, Pentazocine, A natural alkaloid directly obtained from opium is?, Meperidine, Codeine, Hydromorphone, Methadone, Fentanyl, Which combination of drug properties maximizes its ability to cross cell membranes?, Ionized and low lipid solubility, Non-ionized and high lipid solubility, Non-ionized and low lipid solubility, Ionized and water solubility, Ionized and high lipid solubility, Atropine acts pharmacologically as an?, Antispasmodic, Anticholinergic, Sympathomimetic, Antiemetic, Antihistamine, The following drugs have a known tendency to produce blood dyscrasias EXCEPT?, Phenylbutazone, Codeine, Indomethacin, Chloramphenicol, Sulfonamides, During drug-receptor interaction, local anesthetics interfere primarily with the cellular influx of which ion?, Chloride, Sodium, Calcium, Magnesium, Potassium, The principal clinical difference between potassium, procaine, and benzathine salts of penicillin G is their?, Toxicity, Duration of action, Potency, Diffusion into CSF, Antibacterial spectrum, Which of the following antimicrobial agents is chiefly bactericidal in its action?, Tetracycline, Penicillin, Erythromycin, Clindamycin, Chloramphenicol, If an odontogenic infection fails to improve after 48 hours of penicillin therapy, you should next?, Suspect penicillin allergy, Assume a gram-negative organism is present, Perform culture and sensitivity testing on the bacteria, Double the daily dose of penicillin, Administer intravenous penicillin immediately, A major secondary therapeutic use of phenothiazine derivatives (e.g., prochlorperazine) is as an?, Antiemetic, Antidepressant, Antihypertensive, Muscle relaxant, Which of the following agents possesses NO intrinsic analgesic activity?, Methadone, Chloral hydrate, Codeine, Hydromorphone, Meperidine, The rapid termination of action of ultrashort-acting barbiturates like thiopental is due to?, Rapid hepatic metabolism, Rapid tissue redistribution, Rapid renal excretion, Protein conjugation, Development of acute tolerance, The single most important therapeutic measure in managing acute barbiturate poisoning is to?, Aspirate stomach contents, Assure adequate respiration and airway, Alkalinize the urine, Administer a central nervous system stimulant, Administer activated charcoal, A patient with xerostomia complains of needing to sip water to lubricate food during mastication. Which salivary gland is primarily responsible for resting mucin-rich lubrication?, Parotid gland, Submandibular gland, Labial glands, Sublingual gland, Von Ebner's glands, Under normal physiological conditions, the primary chemical stimulator of the respiratory center is?, Low blood pressure, High arterial oxygen tension, Low arterial carbon dioxide tension, High arterial carbon dioxide tension, Low blood glucose level, The majority of absorbed nitrous oxide is eliminated unchanged from the body through the?, Lungs, Kidneys, Hepatic enzymes, Plasma cholinesterases, Gastrointestinal tract, Which of the following terminal nerve branches are anesthetized by a standard infraorbital nerve block? (1) Zygomaticotemporal, (2) Inferior palpebral, (3) Zygomaticofacial, (4) Lateral nasal, (5) Superior labial, (1), (2), (3), (1) and (3), (2), (4), and (5), (4) only, (5) only, A left infraorbital nerve block predictably anesthetizes which teeth?, All maxillary teeth on the left side, Maxillary premolars, canine, and incisors on the left side, Left maxillary canine and incisors only, The entire left maxillary sinus, The entire nasolacrimal duct, Regular ingestion of therapeutic doses of acetylsalicylic acid results in?, Reduced platelet aggregation, Edema of gingival connective tissues, Reduced salivary secretion, Severe thrombocytopenia, Immunosuppression, Acetylsalicylic acid can be safely administered as an analgesic to a patient with a medical history of?, Active gastric ulcer, Aspirin-exacerbated respiratory disease (asthma), Hemophilia A, Stable emphysema (COPD), Duodenal ulcer, Which of the following effects is NOT associated with acetylsalicylic acid?, Tinnitus, Analgesia, Antipyresis, Prolonged bleeding time, Direct opioid receptor activation, Which statements regarding tetracyclines are correct? (1) Free of adverse side effects, (2) May cause fungal superinfections, (3) Safe during pregnancy, (4) Possess a broad spectrum of activity, (1), (2), (3), (1) and (3), (2) and (4), (4) only, (5) only, Which of the following is NOT a classic sign of cyanotic congenital heart disease?, Central cyanosis, Spider telangiectasia, Digital clubbing, Pathologic heart murmur, Right ventricular hypertrophy, A primary therapeutic advantage of penicillin V over penicillin G for oral administration is?, Greater resistance to staphylococcal penicillinase, Broader gram-negative bacterial spectrum, Superior stability in gastric acid resulting in better oral absorption, Significantly slower renal excretion, Complete absence of allergic potential, A patient presenting with congestive heart failure may demonstrate? (1) Epistaxis, (2) Dyspnea/shortness of breath, (3) Rhinophyma, (4) Pitting ankle edema, (1), (2), (3), (1) and (3), (2) and (4), (4) only, (5) only, Acetaminophen administered in therapeutic clinical doses? (1) Retards platelet aggregation, (2) Has strong anti-inflammatory properties, (3) Produces central stimulation, (4) Demonstrates antipyretic properties, (1), (2), (3), (1) and (3), (2) and (4), (4) only, (5) only, Short-acting barbiturates are biotransformed primarily in the?, Liver, Kidneys, Small intestine, Pancreas, Spleen, Which of the following local anesthetics is inactivated primarily by plasma esterases?, Procaine, Lidocaine, Prilocaine, Mepivacaine, Bupivacaine, Procaine differs fundamentally from lidocaine in that?, Procaine is an ester of p-aminobenzoic acid while lidocaine is an amide, Lidocaine is an ester of m-aminobenzoic acid while procaine is not, Procaine has a longer duration of action than lidocaine, Procaine hydrochloride is metabolized into diethylaminoethanol and benzoic acid, Lidocaine is metabolized by pseudocholinesterase, Which local anesthetics will exhibit cross-allergenicity in a patient with a true allergy to lidocaine? (1) Mepivacaine, (2) Tetracaine, (3) Procaine, (4) Prilocaine, (5) Dibucaine, (1), (2), and (3), (1), (4), and (5), (2) and (3) only, (2), (3), and (4), (2), (4), and (5), Hydrolysis of procaine occurs predominantly within the?, Liver, Lungs, Blood plasma, Skeletal muscle, Kidneys, The pharmacological activity of procaine is terminated primarily by?, Unchanged renal elimination, Adipose tissue storage, Hepatic microsomal metabolism exclusively, Hydrolysis by plasma pseudocholinesterase, Red blood cell sequestration, All of the following factors determine the duration of conduction block by amide local anesthetics EXCEPT?, Local tissue pH, Degree of intrinsic vasodilatation, Plasma pseudocholinesterase levels, Regional blood flow, Concentration of injected solution, Which agent is strictly contraindicated in a patient with a documented allergy to procaine?, Lidocaine block, Topical lidocaine, Topical tetracaine, Infiltration with diphenhydramine, Mepivacaine block, Bupivacaine (Marcaine) exhibits all of the following clinical features relative to lidocaine EXCEPT?, Higher systemic toxicity, Chemical structure as an ester-type local anesthetic, Slower onset of action, Longer duration of anesthesia, Higher lipid solubility, Amide-type local anesthetics undergo primary biotransformation in the?, Blood serum, Liver, Spleen, Kidney, Axoplasm, The systemic duration of action and half-life of lidocaine is elevated in patients concurrent taking, Prazosin, Propranolol, Hydrochlorothiazide, Lisinopril, Digoxin, Severe hepatic disease LEAST affects the metabolic clearance of which local anesthetic?, Lidocaine, Procaine, Prilocaine, Mepivacaine, Bupivacaine, Development of cyanosis and methemoglobinemia following large doses of local anesthesia is associated with?, Procaine, Prilocaine, Dibucaine, Lidocaine, Mepivacaine, The most frequent cause of a serious, life-threatening systemic toxic reaction to local anesthetics in dental practice is?, Psychogenic response, Expired anesthetic solution, Epinephrine hypersensitivity, True antigen-antibody allergy, Excessive circulating blood level of the anesthetic, Elevated plasma levels of local anesthetics produce initial toxic CNS signs via?, Direct activation of cortical motor neurons, Stimulation of aortic baroreceptors, Inhibition of cardiac vagal tone, Selective depression of inhibitory cortical neurons, Direct motor endplate depolarization, Following accidental intravascular injection of lidocaine, the earliest clinical sign of CNS toxicity is?, Tachycardia, Profuse sweating, CNS excitation, circumoral numbness, and slurred speech, Immediate cardiovascular collapse, Profound CNS depression, The earliest clinical indicator of systemic epinephrine toxicity/overdose is?, Sudden cardiovascular collapse, Tonic-clonic convulsions, Elevated pulse rate and severe cardiac palpitations, Slurred speech, Respiratory depression, Severe cardiovascular collapse caused by local anesthetic toxicity is caused by direct?, Vasovagal syncope, Central vagal stimulation, Massive histamine release, Myocardial depression and peripheral vasodilatation, Medullary center stimulation, The most dangerous sequela of systemic local anesthetic toxicity following unmanaged seizure activity is?, Severe vertigo, Malignant hypertension, Respiratory alkalosis, Late-stage tonic seizures, Generalized CNS and respiratory depression, Toxic blood levels of local anesthetics cause hypotensive shock EXCEPT in the case of?, Cocaine, Procaine, Lidocaine, Tetracaine, Mepivacaine, Which local anesthetic agent produces central nervous system stimulation marked by euphoria and cortical excitation via monoamine reuptake inhibition?, Cocaine, Procaine, Lidocaine, Tetracaine, Mepivacaine, Local anesthetics block action potential conduction along nerve axons by?, Hyperpolarizing the resting membrane potential, Increasing nerve membrane permeability to K+, Increasing nerve membrane permeability to Na+, Preventing potassium efflux during repolarization, Preventing the transient increase in membrane permeability to Na+, Injected local anesthetic is significantly less effective in inflamed or infected tissues because?, Low tissue pH decreases the concentration of free un-ionized anesthetic base, Regional blood flow is decreased, preventing drug distribution, Inflammatory mediators chemically destroy the anesthetic molecule, Prostaglandins block anesthetic binding sites on sodium channels, Rapid nerve cell breakdown prevents anesthetic uptake, Which statements regarding local anesthetic activity are true? (1) Higher concentration increases speed of onset, (2) Myelinated fibers are blocked at the Nodes of Ranvier, (3) Large diameter fibers are blocked faster than small fibers, (4) Lipid solubility increases nerve penetration speed, (1), (2), and (3), (1), (2), and (4), (1) and (3) only, (2), (3), and (4), (4) only, A standard 1.8 mL dental cartridge of 2% lidocaine contains how many milligrams of lidocaine?, 3.6 mg, 9.0 mg, 18.0 mg, 36.0 mg, 180.0 mg, A 3.0 mL volume of 2% lidocaine with 1?100,000 epinephrine contains?, 6 mg lidocaine, 0.3 mg epinephrine, 6 mg lidocaine, 0.03 mg epinephrine, 60 mg lidocaine, 0.3 mg epinephrine, 60 mg lidocaine, 0.03 mg epinephrine, 600 mg lidocaine, 0.3 mg epinephrine, How many milliliters of 2% mepivacaine must be administered to reach the maximum recommended adult dosage of 300 mg?, 5 mL, 10 mL, 15 mL, 20 mL, 25 mL, An experimental local anesthetic is supplied as a 0.05% solution in 1.8 mL cartridges. If the maximum safe dose is 30 mg, how many cartridges equal this limit?, 1–9, 10–18, 19–27, 28–36, Greater than 36, Based on cardiac safety guidelines, the maximum number of dental carpules containing 1?200,000 epinephrine recommended for a patient with significant ischemic heart disease is?, 1 carpule, 2 carpules, 3 carpules, 4 carpules, 11 carpules, Which penicillin derivative possesses the broadest spectrum of activity against gram-negative enteric bacilli?, Ampicillin, Phenoxymethylpenicillin, Dicloxacillin, Methicillin, Penicillin G, Allergic hypersensitivity reactions to penicillins may present clinically as? (1) Contact dermatitis, (2) Stomatitis, (3) Bronchospasm, (4) Anaphylactic cardiovascular collapse, (1), (2), (3), (1) and (3), (2) and (4), (4) only, (1), (2), (3) and (4), Severe, unpredictable idiosyncratic aplastic anemia is classically associated with systemic treatment using?, Amoxicillin with clavulanic acid, Ampicillin, Nafcillin, Chloramphenicol, Erythromycin, Cholestatic hepatitis and jaundice is an adverse drug reaction specifically associated with which oral formulation of erythromycin?, Erythromycin base, Erythromycin stearate, Erythromycin estolate, Erythromycin ethylsuccinate, Erythromycin lactobionate, Which penicillin formulation is intended EXCLUSIVELY for deep intramuscular repository injection?, Ampicillin, Dicloxacillin sodium, Penicillin G procaine, Penicillin V potassium, Amoxicillin, Which antibiotic exhibits absolute cross-allergenicity with penicillin V?, Ampicillin, Erythromycin, Clindamycin, Lincomycin, Tetracycline, What is the approximate rate of allergic cross-reactivity between first-generation cephalosporins and penicillins, 0%, 10%, 40%, 75%, 100%, Which class of antibiotics is structurally related to penicillins via a shared beta-lactam core?, Polymyxins, Cycloserines, Cephalosporins, Chloramphenicol, Tetracyclines, The most reliable method for a clinician to identify a potential penicillin allergy in an outpatient is?, Intradermal skin patch testing, Completing a detailed medical history, Ocular conjunctival instillation, Inhalation challenge, Intravenous micro-dose injection, Which drug is historically the primary alternative antibiotic for an outpatient with a true penicillin allergy?, Bacitracin, Erythromycin, Tetracycline, Chloramphenicol, Neomycin, Severe anaphylactic reactions to penicillin occur most frequently when? (1) Given orally, (2) In patients with prior penicillin exposure, (4) Administered parenterally, (5) Within minutes of exposure, (1), (2), (4), (2), (3), (4), (2), (4), (5), (1) and (5) only, (3), (4), (5), Infections caused by penicillinase-producing Staphylococcus aureus should be treated with?, Neomycin, Ampicillin, Tetracycline, Penicillin V, Dicloxacillin, Which antibiotic is inactivated by bacterial penicillinase (beta-lactamase)?, Ampicillin, Cephalexin, Methicillin, Clindamycin, Erythromycin, Penicillin exerts its bactericidal effect on actively multiplying bacteria by inhibiting?, Ribosomal protein synthesis, Peptidoglycan cell wall synthesis, Bacterial DNA gyrase, Folate synthesis, Plasma membrane function, Sulfonamides exert a bacteriostatic effect by competing with which substrate in bacterial folic acid synthesis?, Glutamic acid, Para-aminobenzoic acid (PABA), Dihydrofolic acid, Peptidoglycan, Mycolic acid, Which antibiotic achieves higher concentration levels in bone tissue compared to concurrent serum levels?, Penicillin V, Erythromycin, Clindamycin, Metronidazole, Amoxicillin, Which antibiotic is LEAST likely to cause fungal or bacterial superinfection due to its narrow spectrum?, Gentamicin, Tetracycline, Penicillin G, Streptomycin, Chloramphenicol, Pseudomembranous colitis caused by Clostridioides difficile overgrowth is most classically associated with?, Nystatin, Cephalexin, Clindamycin, Polymyxin B, Erythromycin, Which local anesthetic contains an ester linkage but is primarily metabolized in the liver?, Cocaine, Procaine, Tetracaine, Chloroprocaine, Propoxycaine, Epinephrine added to local anesthetic carpules performs all of the following functions EXCEPT?, Decreasing systemic rate of anesthetic absorption, Increasing depth and duration of anesthesia, Decreasing localized bleeding at the surgical field, Elevating solution pH to accelerate onset time, Lowering peak systemic blood level of local anesthetic, Which amide local anesthetic undergoes rapid metabolism in both blood plasma and liver due to its ester group?, Articaine, Lidocaine, Mepivacaine, Bupivacaine, Prilocaine, The primary target binding site for local anesthetic molecules within the nerve cell membrane is the?, Voltage-gated sodium channel, Voltage-gated calcium channel, Potassium leak channel, GABA-A receptor complex, Mu-opioid receptor, Which type of nerve fiber is blocked earliest by local anesthetic solutions?, Large myelinated A-alpha motor fibers, Medium myelinated A-beta sensory fibers, Small unmyelinated C pain fibers, Myelinated proprioceptive fibers, Gamma motor neuron fibers, Which drug acts as a selective competitive antagonist to reverse opioid-induced respiratory depression?, Flumazenil, Naloxone, Atropine, Physostigmine, Neostigmine, Flumazenil is indicated clinically for the rapid reversal of CNS depression caused by?, Opioids, Barbiturates, Benzodiazepines, Local anesthetics, Antihistamines, What is the primary organ responsible for the excretion of water-soluble drug metabolites?, Liver, Kidneys, Lungs, Skin, Biliary tract, The term "first-pass effect" describes drug biotransformation occurring primarily within the?, Stomach lumen before absorption, Liver following gut absorption via portal circulation, Systemic blood plasma, Renal proximal tubules, Pulmonary circulation, Aspirin is contraindicated in pediatric patients with viral illnesses due to the risk of?, Stevens-Johnson syndrome, Aplastic anemia, Reye's syndrome, Acute tubular necrosis, Hemolytic anemia, For a penicillin-allergic patient requiring infective endocarditis prophylaxis prior to dental extraction, the recommended oral antibiotic is?, Amoxicillin, Azithromycin, Metronidazole, Ampicillin, Gentamicin, Epinephrine produces localized arteriolar vasoconstriction primarily by activating which adrenergic receptors?, Alpha-1 receptors, Alpha-2 receptors, Beta-1 receptors, Beta-2 receptors, Nicotinic receptors, Activation of cardiac Beta-1 adrenergic receptors by epinephrine produces?, Bronchodilations, Peripheral vasoconstriction, Increased heart rate and cardiac contractility, Pupillary miosis, Reduced cardiac output, Local anesthesia fails most commonly in the presence of an acute tissue abscess due to?, Local tissue hyper-alkalinity, Decreased tissue pH reducing free base availability, Decreased tissue vascularity, Direct inactivation of sodium channels by pus, Axonal destruction, Accidental administration of epinephrine to a patient taking a non-selective beta-blocker (propranolol) can induce?, A. Severe hypotension and reflex tachycardia, Unopposed alpha-1 vasoconstriction causing hypertensive crisis and reflex bradycardia, Profound bronchodilation, Immediate skeletal muscle paralysis, No altered cardiovascular response, Which local anesthetic agent produces the least intrinsic vasodilatation, making it effective without a vasoconstrictor?, Procaine, Lidocaine, Mepivacaine, Bupivacaine, Articaine, Symptoms that may be characterized as allergic manifestations during penicillin therapy are?, Deafness, dizziness, and acute anemia, Crystalluria, nausea, vomiting, and acute renal failure, Oliguria, hematuria, bronchoconstriction, and jaundice, Dermatitis, stomatitis, bronchoconstriction, and cardiovascular collapse, Tinnitus, alopecia, hypertension, and hyperglycemia

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