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MED239 EKG

MED239 EKG CH02

QuestionAnswer
MED239 CH02
What is the function of the heart? A. To pump blood to and from body tissues B. to pump blood to body tissues C. to pump blood from body tissues D. none of these A. To pump blood to and from body tissues
The process of transporting blood to and from the body tissues is known as circulation. TRUE/FALSE TRUE
The heart is located: A. near the center of the chest, under the sternum B. near center of chest, under sternum, and in between lungs C. under sternum, and in between lungs D. near the center of the chest, in between the lungs B. near center of chest, under sternum, and in between lungs
The average heart is approximately the size of your fist and weighs about 10.6 ounces or A. 30 grams B. 3 grams C. 300 grams D. 3,000 grams C. 300 grams
The heart is tipped to the ____ side of the body with about two-thirds of it located on the ____. A. right/ left side of the chest B. right/ right side of the chest C. left/ left side of the chest D. left/ right side of the chest C. left/ left side of the chest
Which sac consists of two layers: the parietal layer, and the visceral layer? A. pericardium B. epicardium C. myocardium D. endocardium A. pericardium
In adults, the average heart beats approximately 60 to 100 times per minute. TRUE/FALSE TRUE
The ability of the heart cells to receive and transmit an electrical impulse. A. contractility B. excitability C. automaticity D. conductivity D. conductivity
Ability of the heart muscle cells to shorten in response to an electrical stimulus is known as A. repolarization B. contractility C. excitability D. depolarization B. contractility
Located in the upper portion of right atrium/ is the pacemaker of the heart/initiates heartbeat. A. mitral valve B. AV node C. sinoatrial (SA) node D. bundle branches C. sinoatrial (SA) node
_____ delays the electrical conduction through the heart. A. SA node B. AV node C. purkinje fibers D. bundle of His B. AV node
Purkinje fibers distribute the electrical impulses through the right and left ventricles. TRUE/FALSE TRUE
_____ conducts impulses down both sides of the interventricular septum. A. bundle branches B. Purkinje network C. AV bundle D. mitral valve A. bundle branches
Repolarization is a state of cellular recovery, which follows each contraction. TRUE/FALSE TRUE
Time between ventricular depolarization and the beginning of ventricular repolarization. A. U wave B. ST segment C. P wave D. PR interval B. ST segment
From the start of ventricular depolarization to the end of ventricular repolarization. A. T wave B. QRS complex C. QT interval D. U wave C. QT interval
Beginning of atrial depolarization to the beginning of ventricular depolarization. A. PR interval B. ST segment C. T wave D. U wave A. PR interval
Repolarization of the bundle of His and Purkinje fibers (not always seen). A. U wave B. QT interval C. PR interval D. T wave A. U wave
Small upward sloping curve/Ventricular repolarization. A. QT interval B. QRS complex C. U wave D. T wave D. T wave
Ventricular depolarization and resulting ventricular contraction/ atrial repolarization occurs. A. QRS complex B. P wave C. U wave D. T wave A. QRS complex
Upward small curve/Atrial depolarization with resulting atrial contraction. A. ST segment B. U wave C. P wave D. T wave C. P wave
The ECG waveform is a measurement of the heart actions. TRUE/FALSE TRUE
First positive wave of the QRS complex. A. R wave B. S wave C. ST segment D. T wave A. R wave
First negative deflection after the R wave. A. P wave B. S wave C. T wave D. U wave B. S wave
Normal length of time is 0.12-0.20 seconds. A. QT interval B. T wave C. PR interval D. QRS complex C. PR interval
Important when measuring the length of the QRS complex. A. PR interval B. QT interval C. J point D. R to R interval C. J point
Used to calculate heart rate. A. R to R interval B. QT interval C. ST segment D. PR interval A. R to R interval
The heart consists of four chambers and two valves. TRUE/FALSE FALSE
Blood travels from the pulmonary and systemic circulation. TRUE/FALSE FALSE
What is known as the heart's pacemaker? A. medulla oblongata B. vagus nerve C. AV node D. SA node D. SA node
Valve located between the right ventricle and the pulmonary artery. A. Bicuspid Valve B. Pulmonary Valve C. Mitral Valve D. Tricuspid Valve B. Pulmonary Valve
The protective sac that surrounds the heart. A. peristalsis B. pericardium C. pleura D. perimetrium B. pericardium
The largest artery of the body; it receives oxygenated blood from the left ventricle. A. Superior Vena Cava B. Carotid Artery C. Aorta D. Jugular Vein C. Aorta
What are the top chambers of the heart called? A. valves B. atria C. pericardium D. ventricles B. atria
This is the valve between the left atrium and left ventricle. A. mitral valve B. semilunar valve C. pulmonary valve D. tricuspid valve A. mitral valve
Describes the circulation of blood between the heart and the cells of the body. A. pulmonary B. lymphatic C. coronary D. systemic D. systemic
What is the correct sequence of the conduction system of the heart? A. SA node, AV node, AV bundle, Purkinje fibers B. AV node, SA node, AV bundle, Purkinje fibers C. AV bundle, SA node, AV node, Purkinje fibers D. AV node, as a node, Purkinje fibers, AV bundle A. SA node, AV node, AV bundle, Purkinje fibers
Delicate microscopic vessels that carry nutrient rich blood from the arteries to the cells. A. veins B. capillaries C. alveoli D. bronchioles B. capillaries
The wall that separates the two sides of the heart. A. S.A. Node B. Septum C. AV Node D. Bundle of His B. Septum
What pressure in the arteries is associated with the ventricles contracting? A. diastolic B. systolic C. heart flutter D. coronary B. systolic
The valve between the right atrium & right ventricle. A. bicuspid valve B. mitral valve C. tricuspid valve D. semilunar valve C. tricuspid valve
Created by: C to the C
 

 



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