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🛍️ Shopee - 🛍️ LQ 06: The Anatomy of the Heart, Cardiac Skeleton and Conduction System & Cardiac Electrophysiology and the Electrocardiogram [page 298]
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Published
01/14/2024
1. A 54 y.o. male is admitted due to difficulty breathing. Imaging and echocardiography revealed aortic valve stenosis with left ventricular enlargeme…
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01/14/2024
2.A 55 y.o. company executive is to undergo a coronary bypass procedure. The artery of primary concern is the vessel that supplies much of the left v…
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01/14/2024
3. During an anatomy class dissection, a 1st yr medical student is able to insert his index finger into the transverse pericardial sinus. This maneuv…
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01/14/2024
4. Relative to its position with the root of the lung in the mediastinum, the vagus nerve lies: A. Superiorly B. Inferiorly C. Posteriorly D.Anteriorl…
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01/14/2024
5. Surface of the heart formed by both ventricles: A. Apex B. Base C. Sternocostal surfaceD. Diaphragmatic surface
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01/14/2024
6. The posterior line of reflection of the parietal pericardium with the visceral pericardium occurs at : A. Transverse pericardial sinus B. Roots of …
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7. What subdivision of the mediastinum contains the arch of aorta, tracheal bifurcation and arch of the azygos vein? A. Superior mediastinumB. Poster…
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01/14/2024
8. What vein accompanies the posterior descending branch of the right coronary artery? A. Small cardiac vein B. Middle cardiac vein C. Coronary sinus …
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01/14/2024
9. Which of the following describes the anatomic location of the tricuspid valve? A. Left half of the sternum opposite 4th costal cartilage B. Medial…
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01/14/2024
10. Which of the following structures traverses both the superior mediastinum and the posterior mediastinum? A.Aorta and esophagusB. Branches of the …
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01/14/2024
Connective tissue type surrounding the valves and extending to the cusps: A. Dense elasticB. Dense irregularC. Areolar D. Dense fibrous
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2.The specialized cardiac cell found in both the SAN and AVN: A. Transitional B. Purkinje C. Ordinary cardiacD.Pacemaker
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01/14/2024
3. Which of the following is a histologic feature of the endocardium? A. P cells in subendocardium B. Purkinje cells in the middle part C. Fibroelast…
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01/14/2024
4. Which of the following is true of the Purkinje fibers?A. Diminished amount of fibrilsB. Reduced amount of organellesC. Peripheral nucleiD. SER…
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01/14/2024
5.Which of the following tissues is present in both the endocardium and myocardium? A. adipose B. simple squamous epitheliumC. loose connectiveD.…
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01/14/2024
According to Boron the funny current is stimulated when: A.K+ efflux is diminished B.Membrane is hyperpolarized from a previous action potentialC.K+ …
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01/14/2024
According to Guyton the upstroke phase of the SRAP is due to:A. Na+ influx and Ca++ influxB.Na+ influx C.Na+ influx,Ca++ influx and K+ effluxD.Ca++ in…
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01/14/2024
Alexa counted 18 small squares between two successive R waves and then computed for the heart rate. It should be _______ beats per minute. A.78 B.83C…
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01/14/2024
Compared to Fast response action potential (FRAP), the slow response action potential (SRAP) has aA.Less negative resting potentialB.Faster veloc…
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01/14/2024
Emilia counted 2.5 squares from the onset of the R wave to the end of the S wave. She computed the QRS interval to be: A.O.125 sec B. 1.0 sec C. 0.1 …
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01/14/2024
If the initial QRS vector is at (+)98 degrees, a Q wave will be seen in lead/s:A. aVLB. aVR C. ID. I, aVL, and aVR
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01/14/2024
7. If the left atrium is enlarged, which of the following ECG intervals would be prolonged? A.QT B.RR C.PRD. QRS
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01/14/2024
8. If the mean P vector is at (+)68 degrees, the P wave is tallest in lead: A. I B.aVFC.II D.aVL
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01/14/2024
9. Impulse conduction is fastest in the: A. Internodal tracts B. Terminal Purkinje network C. Bundle of His D.Bundle branches
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01/14/2024
10. The discharge rate of nodal cells can be decreased by: A. Making the initial resting potential less negative B. Increasing the slope of depolari…
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01/14/2024
11. The resting membrane potential in atrial and ventricular muscles is primarily due to: A. Na+ influx B. K+ influxC. K+ effluxD. Na+ efflux
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01/14/2024
12. This ECG configuration measures ventricular depolarization time. A. QRS complexB. RR intervalC. QT intervalD.QRS interval
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01/14/2024
13. Which of the following associations between chest leads and locations of their positive electrodes is correct? A. V1 – 4th intercostal space, lef…
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01/14/2024
14. Which of the following ventricular components would be repolarized first? A. Antero-septal regionB. Postero-basal region of the left ve…
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01/14/2024
15. Which of these associations between the phases of fast response action potential and their primary causes is correct (according to Boron)? A. Fin…
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