acls quizlet pretest acls quizlet pretest

A patient is in cardiac arrest. 17. ACLS Pretest Questions and Answers 2023 (Full Practice Test) ACLS Pretest Questions and Answers 2023 (Free Full Practice Test). Which therapy is now indicated? Lidocaine 1 mg/kg IV and infusion 2 mg/min. She now states she is asymptomatic after walking around. 136 terms. Blood pressure is 130/70 mm Hg. Right ventricular infarction and dysfunction. You would first order: A second dose of amiodarone is now called for. The gotestprep.com provides free unofficial review materials for a variety of exams. ACLS EXAM PACKET FOR VERSIONS A AND B COMP,LETE WITH A TEST BANK AND EXAM PACK FOR BOTH VERSIONS LATEST UPDATE NOVEMBER 2022. Repeat amiodarone 300 mg IV. 36. Your next action is to: 5. High-quality chest compressions are being given. A patient with STEMI has ongoing chest discomfort. What is the recommended oral dose of aspirin for patients suspected of having one of the acute coronary syndromes? A monophasic waveform defibrillator is available to you. 3. Central line Heart rate 90/min. He was brought to the emergency department. 2. The most common cause of a stroke is: 41. How does complete chest recoil contribute to effective CPR? Note this pretest does not represent the actual examination questions. Consider sedation and perform synchronized cardioversion with 100 joules, b. Aspirin was not taken by the patient because he had a history of gastritis treated 5 years ago. What is the appropriate next intervention? You are the code team leader and arrive to find a patient with above rhythm and CPR in progress. Pain described as a 8/10 and unrelieved after 3 doses of nitroglycerin. A patient has been resuscitated from cardiac arrest and is being prepared for transport. Vagal maneuvers have not been effective in terminating. Chest pain or shortness of breath is present. 5. Give an additional 2 mg of morphine sulfate. His blood pressure is 180/100 mm Hg. What is the next action after establishing an IV and obtaining a 12-lead ECG? 4. Determine the mass moments of inertia of the assembly about the x-, y-, and z- axes. The actual exam may differ from our materials. The monitor shows a regular narrow-complex QRS at a rate of 180/min. For that we provide aha written exam 2023 real test. A weak pulse is present at a rate of about 70. Which action do you take next? Sodium bicarbonate 50 mEq about 3-5 minutes. 1. Write a Lewis structure for N2_22H4_44. Her mental status is rapidly decreasing and she is very pale. Perform endotracheal intubation. Select the incorrect statement regarding the automated external defibrillator (AED). 1. Questions and Answers 1. 1. Dose of 3 mg This is a sample copy of the American Heart Association (AHA) Advanced Cardiac Life Support Precourse Self Assessment Question Answers. What is the recommended duration of therapeutic hypothermia after reaching the target temperature? D. Give normal saline 250 mL to 500 mL fluid bolus. Tepat sekali pada kesempatan kali ini pengurus web mau membahas artikel, dokumen ataupun file tentang Acls Pretest Code 2021 Quizlet yang sedang kamu cari saat ini dengan lebih baik.. Dengan berkembangnya teknologi dan semakin banyaknya developer di negara kita, maka . This patient has been resuscitated from cardiac arrest. About every 5-6 seconds The lead II ECG is displayed below. Heparin 4000 units IV bolus and a heparin infusion of 1000 units per hour are being administered. Vasopressin, amiodarone, lidocaine BP is 132/68 mmHg, pulse is 130/min and regular, RR is 12 breaths/min, and pulse oximetry reading is 95%. A patient with pulseless ventricular tachycardia is defibrillated. ACLS PreTest, ACLS PreTest: Pharmacology and Practical Study with Quizlet and memorize flashcards containing terms like Sinus Bradycardia, Reentry supraventricular tachycardia, Second-degree AV block (Mobitz II Apakah Anda lagi mencari postingan seputar Acls Pretest Code 2021 Quizlet tapi belum ketemu? Attempt endotracheal intubation with minimal interruptions in CPR. 5. Q5. He has a history of angina. He is being evaluated for another acute stroke. 1 to 2 L of normal saline. Emergency medical responders are unable to obtain a peripheral IV for a patient in cardiac arrest. Which drug should be given next? Administer adenosine 6 mg; seek expert consultation. 150 mg IV push. Give a single shock. A patient was in refractory ventricular fibrillation. Initiate transcutaneous pacing (TCP). 3. What is the most common complication in the first few hours of an acute myocardial infarction? 2. Give sublingual nitroglycerin 0.4 mg. What is the next step in your assessment and management of this patient? Bradycardia requires treatment when: Resume high-quality chest compressions. What is the recommended energy dose for biphasic synchronized cardioversion of atrial fibrillation? Her blood pressure is 128/70 mm Hg. Which Of the following statements is true Of right ventricular infarction (RVI)? Single rescuers should use a compression-to-ventilation ratio of 30 compressions to 2 breaths when giving CPR to victims of any age. Get immediate feedback while you prepare for your exam. When the patient arrives in the emergency department, the rhythm shown here is seen on the cardiac monitor. Perform synchronized cardioversion, What is the recommended compression rate for high-quality CPR? 1. Administer adenosine 6 mg; seek expert consultation. 4. ACLS pretest Flashcards Study with Quizlet and memorize flashcards containing terms like Chest compressions for an adult are performed: a. at a rate between 60-80 compressions b. (b) What is the sign of H\Delta HH for this reaction? IV/IO drug administration during CPR should be. You arrive on the scene with the code team. Which combination of drugs can be administered by the endotracheal route? February 18, 2023 at 7:37 pm. 5. The heart rate has not responded to vagal maneuvers. d. chemical bonds. Her blood pressure is 126/72, respirations 14. Seeking expert consultation. Your immediate next order is: Endotracheal intubation Chest compressions should never be interrupted, c. Interruptions in chest compressions to analyze the ECG, Charge the defibrillator, place an advanced airway, check a pulse, or other procedures must be kept to a minimum, d. Chest compressions and ventilations should be interrupted every 3 to 5 minutes to permit the members Of the resuscitation team to change positions, a. Airway, breathing, circulation (ABCs); 02; IV; sedation; and synchronized cardioversion with 200 joules, b. ABCs, 02, IV, vagal maneuvers, and lidocaine 1- to 1.5-mg/kg IV bolus, c. ABCs, 02, IV, and atropine -mg IV every 3 to 5 minutes to a maximum Of 3 mg, d. ABCs, 02, IV, vagal maneuvers, and adenosine 6-mg rapid IV bolus, d. Prepare the to insert an advanced airway, b. 4. What should be done to minimize interruptions in chest compressions during CPR? You have completed your first 2-minute period of CPR. Temporary pacing. 2. Give metoprolol 5 mg IV and repeat if necessary. Continue CPR, start an IV, intubate using the largest endotracheal tube available, and give epinephrine and atropine, c. Stop CPR and attempt transcutaneous pacing, then start an IV and begin a dopamine infusion, d. Attempt synchronized cardioversion using 100 joules; if the rhythm is unchanged, start an IV, and intubate using the largest endotracheal tube available, b. You are the team leader. Which of the following statements about the use of magnesium in cardiac arrest is most accurate? Your patient is a 56-year-old woman with a history of type 2 diabetes who reports feeling dizzy. Most myocardial infarctions occur because of: Questions 21 through 25 pertain to the following scenario. A patient is in pulseless ventricular tachycardia. 4. His monitored rhythm becomes irregular as seen above. 2. Give amiodarone 300 mg IV push. Which intervention would be your next action? Do not give aspirin for at least 24 hours if rtPA is administered. Blood pressure is 108/70 mm Hg. A defibrillator is present. 5. Atropine 0.5 mg IV, total dose 2 mg as needed. Good luck! The Advanced Cardiovascular Life Support (ACLS) Precourse Self-Assessment is an online tool that evaluates a student's knowledge before the course to determine their proficiency and identify any need for additional review and practice in 3 sections: rhythm recognition, pharmacology, and practical application. The patient had resolution of moderate (5.10) chest pain with 3 doses of sublingual nitroglycerin. These quizzes cover the latest PALS algorithms and are designed to test the scenarios you will encounter when practicing PALS. 4. Ventilating as quickly as you can Place an esophageal-tracheal tube or laryngeal mask airway. Which of the following factors reduces transthoracic resistance and enhances the chance for successful defibrillation in cardiac arrest? (c) How much energy is released by the combustion of 1.00 mol of C8H18\mathrm{C}_8 \mathrm{H}_{18}C8H18 ? There are no allergies or contraindications to any medication. Seeking expert consultation A patient is in cardiac arrest. Establish IV access. Dose of 0.1mg Central line High-quality CPR is in progress. 21 . 3. An IV is in place, and no drugs have been given. His pulse is weak and fast. Adenosine 6 mg Dose of 0.5mg. ACLS Precourse Self Assessment Answers (Pharmacology, Rhythm) Questions Answers 2011-2022. 5. 50 terms. Oxygen is being administered by nasal cannula at 4 L/min, and an IV line is in place. 4. If the area of the plates of a parallel-plate capacitor is doubled while the spacing between the plates is halved, how is the capacitance affected? A patient has been resuscitated from cardiac arrest. A 45-year-old woman with a history of palpitations develops light-headedness and palpitations. 3. 12. Initiate epinephrine at 2 to 10 mcg/kg per minute. 4. Acls pretest answers 2021 quizlet - Study with Quizlet and memorize flashcards containing terms like 3 AV block p and qrs completely separate, Pulseless. She is now extremely apprehensive. 5. Which drug do you anticipate giving to this patient? When the patient arrives in the emergency department, the rhythm shown here is seen on the cardiac monitor. What drug should the team leader request to be prepared for administration next? Which treatment or medication is appropriate for the treatment of a patient in asystole? Vasopressin 20 units Merci. The cardiac monitor documents the rhythm shown here. Reply. 3. An 80-year-old woman presents to the emergency department with dizziness. 4. Acls pretest answers 2021 quizlet - This Acls pretest answers 2021 quizlet helps to fast and easily solve any math problems. How do insects contribute beneficially to agriculture? Give normal saline bolus 250 mL to 500 mL. Atropine 1 mg IV, total dose 3 mg as needed. The patients sister states that 15 minutes ago, the patient said she couldnt breathe and then lost consciousness. During the resuscitation, amiodarone 300 mg was administered. 2. Give magnesium sulfate 1 to 2 g IV diluted in 10 mL D5W given over 5 to 20 minutes, This patient was admitted to the general medical ward with a history of alcoholism. The patient is confused, and her blood pressure is 88/56 mm Hg. AHA ACLS Practice Test. There is no pulse or spontaneous respirations. 4. He suddenly has the persistent rhythm shown below. you do now? Perform synchronized cardioversion starting with 50 joules, c. Perform CPR for 2 minutes, then defibrillate with 200 joules, d. Perform CPR and give epinephrine 1 mg IV push, a. Your patient is in cardiac arrest and has been intubated. The patient's blood pressure is 128/58 mm Hg, the PETCO2 is 38mm Hg, and the pulse oximetry reading is 98%. Give atropine 0.5 mg IV . An oral airway is in place. Whch of the following statements is true about ventilation with a bag-valve-mask? He is receiving oxygen and 2 sublingual nitroglycerin tablets have relieved his chest discomfort. 3. What is the recommended initial airway management technique? A patient in respiratory distress and with a BP of 70/50 mmHg presents with the following lead II ECG rhythm. Perform emergency synchronized cardioversion. The patient's 12-lead ECG show an MI. Give atropine 1 mg IV. 2. To assess CPR quality, which should you do? You see an organized, nonshockable rhythm on the ECG monitor. Give epinephrine 1 mg IV/IO What is the recommended target temperature range for achieving therapeutic hypothermia after cardiac arrest? 4. Angiotensin-converting-enzyme (ACE) inhibitors: 39. 1. Administer the shock immediately and continue as directed by the AED. Perform endotracheal intubation; administer 100% oxygen. Giving lidocaine 1 to 1.5 mg IV bolus. 3rd Degree Block (Complete Heart Block) 2. By the endotracheal route whenever possible, c. By IV bolus and followed with a 20-mL flush of IV fluid, d. By IV bolus over 2 to 3 minutes and then followed with a 10-mL flush of IV fluid, c. Continue peripheral IV attempts until successful, a. There is vascular access in the left arm, and the patient has not been given any vasoactive drugs. Click the card to flip Definition 1 / 45 A) Monitor the patient's PETCO2 Click the card to flip Flashcards Learn Give amiodarone 300 mg IV. About every 8-10 seconds ST Elevation and her skin color is pale. During the resuscitation, she received 2 doses of epinephrine 1 mg and 1 does of amiodarone 300 mg IV. 5. Bag-mask ventilations are producing visible chest rise, and IO access has been established. A patient with sinus bradycardia and a heart rate of 42/min has diaphoresis and a blood pressure of 80/60mm Hg. Administer epinephrine 1 mg. vfib What is your next action? Dopamine 2 to 20 mcg/kg per minute IV or IO. What is the most appropriate intervention for a rapidly deteriorating patient who has this lead II ECG? Which of the following is indicated first? A monitored patient in the ICU developed a sudden onset of narrow-complex tachycardia at a rate of 220/min. Repeat adenosine 3 mg IV. 1. Chest pain or shortness of breath is present. The BLS practice exam includes questions and answers covering common questions found in the certification exam. Which drug should be administered first? 1. 4. 2. For that we provide acls review free real test. , () ) : (2020-2025 guidelines) Go to Quiz #2. AAOS Terms to Know: Chapter One, EMS Systems, Exercise Physiology: Theory and Application to Fitness and Performance, Edward Howley, John Quindry, Scott Powers, Sports Medicine Essentials: Core Concepts in Athletic Training and Fitness Instruction, Energy Systems Energy System Lecture 3 (Chapt. A responder is caring for a patient with a history of congestive heart failure. Obtain a 12-lead ECG. 5. 3. Administer amiodarone 300 mg. 2. Breathing is shallow at 8 to 12 breaths/minute. Ventricular fibrillation has been refractory to an initial shock. She has no pulse or respirations. Which action is indicated next? 37. The patient is intubated. Nursing staff report that the patient was recovering from a pulmonary embolism and suddenly collapsed. 1. Is used to slow the ventricular rate in narrow-QRS tachycardias, b. One dose of epinephrine was given after the second shock. V fib Very helpful thank you. 4. Conduct a problem-focused history and physical examination. An antiarrhythmic drug was given immediately after the third shock. What action minimizes the risk of air entering the victim's stomach during-bag mask ventilation? Adenosine 12 mg IV slow push (over 1 to 2 minutes)Metoprolol 5 mg IV and repeat if necessary 1. 38. B. The monitor shows a regular wide-complex QRS at a rate of 180/min. 4. Intubation and administration of 100% oxygen, Your patient is not responsive and is not breathing. 2. 3. 1. 2. 1. Acls Pretest Code 2021 Quizlet. A 35-year-old woman presents with a chief complaint of palpitations. You can download this pretest question answer for American Heart Association (AHA) Advanced Cardiac Life Support Practice Test exam preparation. 2. Click the card to flip Flashcards Learn Test Match Created by BRhodes7 Terms in this set (62) 3 AV block p and qrs completely separate Identify the rhythm. If the thermocouple senses a temperature of 320C320^{\circ} \mathrm{C}320C when the duct surface temperature is 175C175^{\circ} \mathrm{C}175C, what is the actual gas temperature? He is asymptomatic, with a blood pressure of 110/70 mm Hg. She has received adenosine 6 mg IV for the rhythm shown here, without conversion of the rhythm. 3. Lidocaine 0.5 mg/kg, Your patient has been intubated. 5. An antiarrhythmic drug was given immediately after the third shock. She is alert and oriented. Return Practice Test Library. Start an IV and give epinephrine 1 mg IV. The cardiac monitor documents the rhythm shown here. At this time you would: SVT Magnesium is contraindicated for VT associated with a normal QT interval. The preferred site for initial placement of a large IV catheter is the: 24. Which intervention is indicated first? Femoral vein True or False: Rapid, wide-QRS rhythms associated with pulselessness, shock, or congestive heart failure should be presumed to be ventricular tachycardia. A rhythm check now finds asystole. 3. One does of epinephrine was given after the second shock. Which of the following best describes this patient? You arrive on the scene with the code team. February 17, 2023 at 6:10 am. A 35-year-old woman presents to the emergency department with a chief compliant of palpitations. Start chest compressions at a rate of at least 100/min. Resume high-quality chest compressions, What is the maximum interval for pausing chest compressions? A third shock has just been administered. . Atropine 1 mg Establish an IV and give epinephrine 1 mg. What is the indication for the use of magnesium in cardiac arrest? Prepare to give epinephrine 1 mg IV. Team members report that the patient was well but reported chest pain and then collapsed. 1. What is the proper order of the BLS Chain of Survival . A code is in progress and he has recurrent episodes of this rhythm. The monitor shows a regular wide-complex QRS at a rate of 180/min. Sample ACLS tests. 3. Give aspirin 160 to 325 mg to be chewed immediately In which situation does bradycardia require treatment? A patient is in cardiac arrest. The cardiac monitor reveals the following rhythm. 51 terms. 4. Give an immediate unsynchronized high-energy shock (defibrillation dose). 1. A patient is in pulseless ventricular tachycardia. A patient's 12-lead ECG was transmitted by the paramedics and showed an acute MI. Epinephrine 1 mg Dopamine at 10 to 20 mcg/kg per minute A patient has a witnessed loss of consciousness. 50. 3. Step-by-Step Training ACLS Interactive Course Guide Accreditation and CEU Information ACLS Quizzes & Scenarios ACLS Megacode Simulator ACLS Practice Tests She is intubated and is receiving 100% oxygen. Lidocaine 1 mg/kg IV/IO The drug of choice for most forms of narrow-QRS tachycardia is: 2. Start an IV and give atropine 1 mg. 3. Adenosine 3 mg IV bolus Fibrinolytic therapy has been ordered. A 56-year-old man reports that he has palpitations but not chest pain or difficulty breathing. Epinephrine Sotalol Amiodarone Procainamide When should an unconscious patient receive only rescue breaths and not CPR? 5. About every 17-18 seconds, Which action is likely to cause air to enter the victim's stomach (gastric inflation) during bag-mask ventilation? haileybaret. Start epinephrine 2 to 10 mcg/min. Dopamine at 2 to 10 mcg/kg per minute. Which of the following statements is most accurate regarding the administration of vasopressin during cardiac arrest? A 62-year-old man suddenly experienced difficulty speaking and left-sided weakness. Basic ACLS Practice Test Improve your ACLS knowledge and skills with our free practice test. Perform immediate synchronized cardioversion. 2. IV or IO, A patient has sinus bradycardia with a heart rate of 36/min. ACLS pretest Flashcards | Quizlet ACLS pretest 4.6 (38 reviews) Term 1 / 62 3 AV block p and qrs completely separate Click the card to flip Definition 1 / 62 Identify the rhythm. A 56-year-old man reports that he has palpitations but not chest pain or difficulty breathing. The ventricular rate is 138/min. What is the next action? Family members found a 45 year old woman unresponsive in bed. Which of the following statements is true about this rhythm? The cardiac monitor showed VE The paramedics defibrillated immediately with a successful conversion to a sinus rhythm. Asystole now Use of a phosphodiesterase inhibitor within 12 hours, A patient is in cardiac arrest. She is apprehensive but has no symptoms other than palpitations. He meets initial criteria for fibrinolytic therapy, and a CT scan of the brain is ordered. Some AEDs are programmed to detect spontaneous movement by the patient or others, b. 4. After resuming high-quality compressions, which action do you take next? He is asymptomatic, with a blood pressure of 110/70 mm Hg. This is an introduction to content further reviewed in other quizzes. 42. Usually, it consists of 20 questions, but we've collected many more. You observe the rhythm below on the monitor. 3. 1. High-quality CPR is in-progress. Check the pulse rate 1. Your next action will be to: 6. Reentry supraventricualr tachycardia (SVT) Substitute clopidogrel 300 mg loading dose. You can check the answers after each of the . Atropine 1 mg, A 35-year-old woman has palpitations, light-headedness, and a stable tachycardia. On the next rhythm check, you see the rhythm shown here. The primary survey reveals that the patient is unresponsive and not breathing. ACLS Pretest Flashcards. ACLS ECG Rhythm Strips Pretest ACLS ECG Rhythm Strips Practice Test (Quiz) Rhythm identification and Cardiac rhythm interpretation Name the following rhythms from the questions below: Download ACLS ECG Rhythm Question Answers PDF You may try the following ACLS tests ACLS Practice Test 2023 with study guide ACLS Pharmacology Pretest [SET 1] Atropine 0.5 mg, A patient with sinus bradycardia and heart rate of 42/min has diaphoresis and a blood pressure of 80/60 mm Hg. What is the recommended route for drug administration during CPR? What is the first drug/dose to administer? Give lidocaine 1 to 1.5 mg IV and start infusion. You arrive on the scene to find CPR in progress. 90 to 100 compressions per minute What would There is vascular access in the left arm, and the patient has not been given any vasoactive drugs. Patient is diaphoretic, with associated shortness of breath. Give amiodarone 300 mg IV A patient has sinus bradycardia with a heart rate of 36/min. Giving breaths over 1 second Please identify the rhythm by selecting the best single answer. What is the next appropriate intervention? Give atropine 0.5 mg IV. 1. Pulseless Electrical Activity 3. What is the next action? Giving adenosine 6 mg IV bolus. Which drug should be administered first? Your rescue team arrives to find a 59-year-old man lying on the kitchen floor. Paramedics arrive in the emergency department with a 40-year-old man. Should be given only to patients with narrow-QRS tachycardia or dysrhythmias known with certainty to be Of supraventricular origin, b. A patent peripheral IV is in place. Launch This Course Quick Facts What would be your next order? Epinephrine 3 mg While taking the patients history and vital signs, he experienced a cardiac arrest. 3. 19. Gain instant access to all of the practice tests, megacode scenarios, and videos. 4. After verifying the absence of a pulse, you initiate CPR with adequate bag-mask ventilation. C. Give nitroglycerin 0.4 mg sublingually. Match each description on the left with the appropriate term on the right. Your best course Of action at this time will be to: 27. The child is lying on the couch. Sodium bicarbonate 50 mEq. Divert the patient to a hospital 15 minutes away with CT capabilities. Improving patient outcomes by identifying and treating early clinical deterioration. Apply an AED She has no chest discomfort, shortness of breath, or light-headedness. What is the appropriate next intervention? . Reentry SVT 9. About every 2 minutes A patient becomes unresponsive. Check the carotid pulse 1. 4. Her blood pressure is 120/78 mm Hg. 2. Advanced cardiac life support, or advanced cardiovascular life support, often referred to by its abbreviation as "ACLS", refers to a set of clinical algorithms for the urgent treatment of cardiac arrest, stroke, myocardial infarction (also known as a heart attack), and other life-threatening cardiovascular emergencies. You are working in the radiology department as a registered nurse. What is the recommended compression rate for high-quality CPR? Reentry SVT 5. 4. In this situation, the groper rate for bag-valve-mask. Get ACLS recertification online, BLS renewal, and PALS recert online. Bag-mask ventilations are producing visible chest rise. His wife tells you that they were talking and he suddenly got a funny look on his face and collapsed. 3. 1. She rates her discomfort an 8 on a O to 10 scale. High-quality CPR is in progress. What is the immediate danger of excessive ventilation during the post-cardiac arrest period for patients who achieve ROSC? What is your next intervention? The patient is intubated and an IV has been started. The rhythm is asystole. 2. Perform immediate electrical cardioversion. 70 to 80 compressions per minute ACLS Pretest. 1. 2. A patient is in cardiac arrest. High-quality CPR is in progress. Ventilating until you see the chest rise Which intervention below is most important, reducing in-hospital and 30-day mortality? 5. She becomes diaphoretic, and her blood pressure is 80/60 mm Hg. Lidocaine 1 to 1.5 mg IV; star infusion. PEA 2. 5. A thermocouple junction is inserted in a large duct to calculate the temperature of hot gases flowing through the duct. BP is 130/88 mmHg, HR is 110/min, RR is 22 breaths/min, and pulse oximetry is 95%. Sodium bicarbonate 50 mEq IV/IO, Which action should you take immediately after providing an AED shock? A patient has a rapid irregular wide-complex tachycardia. The patient is confused, and her blood pressure is 110/60 mm Hg. Establish and IV and give vasopressin 40 units. Magnesium is indicated for shock-refractory monomorphic VT. She becomes diaphoretic, and her blood pressure is 80/60 mm Hg. Epinephrine 3 mg via endotracheal route. In Hospital Ventricular Fibrillation. AHA ACLS Questions. 5. The use of lower energy levels (10 to 25 joules), c. Giving calcium chloride before each defibrillation attempt, d. The delivery of shocks in sets of three when a shock is indicated, a. During post-ROSC treatment, the patient becomes unresponsive, with the rhythm shown here. The gas may be assumed to have the properties of air at atmospheric pressure. Recognizing Connections Why is a third-degree burn dangerous because it obliterates the skin's epidermis and dermis?