Bio 169 Cardiology and immunity Exam Questions With Correct Answers
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Course
BIO 169
Institution
BIO 169
Bio 169 Cardiology and immunity Exam
Questions With Correct Answers
Papillary muscles - answerextend from the endocardium of both ventricles and are attached
to the cusps of the right and left valves
right bundle branch - answeris a bifurcation of conduction myofibrils at the interventricular
...
BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
Bio 169 Cardiology and immunity Exam
Questions With Correct Answers
Papillary muscles - answer✔✔extend from the endocardium of both ventricles and are attached
to the cusps of the right and left valves
right bundle branch - answer✔✔is a bifurcation of conduction myofibrils at the interventricular
septum that distributes the impulses from the AV bundle to the right ventricle
Atrial Tachycardia - answer✔✔arrhythmia that usually has a rate between 150-250 bpm and
consist of rapid heart rates that result from a regular succession of ectopic beats in the atria or
from a reentry pathway within the AV node
An electrocardiogram is a surface measurement of the electrical potential generated by electrical
activity in - answer✔✔purkinge fibers
the heart comprises_______% of the body weight and uses ______% of the body's oxygen -
answer✔✔.5%; 5%
the ________ returns 20% of the coronary circuit venous return to the __________ -
answer✔✔small coronary veins; right ventricle
the ________ valve prevents backflow from the RV into the RA during RV _______ -
answer✔✔tricuspid; systole
specialized muscle structures in the ventricles called ____________ contribute to the structure of
the chambers - answer✔✔trabeculae carnae
the epicardium and the parietal pericardium secrete ___________ fluid into the ___________ sac
- answer✔✔serous; pericardial
the LAV along with the RAV form the _________ heart sound known as __________ -
answer✔✔first; lubb
NSR is the abbreviation for - answer✔✔normal sinus rhythm
composed of auto-rhythmic cells located at the junction of the four chambers of the heart, this
acts as the secondary pacemaker_________ - answer✔✔atrio-ventricular node
, BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
the ______ wave is the first positive deflection that represents atrial _________ as it spreads
from the _____ node and across both atria - answer✔✔P; depolarization; SA
known as the flat line or asystole, this point denotes neither a negative nor positive deflection -
answer✔✔isoelectric trace line
the period when all heart muscle of the chambers is at rest is known as the - answer✔✔quiescent
this interval represents the time it takes for ventricular depolarization to occur - answer✔✔QRS
interval
the equilateral triangle that represents the three lead EKG is called - answer✔✔Einthoven's
triangle
a 12 lead EKG views the heart from ________ angles and a 3 or 5 lead EKG views it from
_________ to ___________ angles - answer✔✔12; 1; 3
electrode _________ on a 3 lead EKG establishes a common ground for the body and the
electrocardiograph - answer✔✔three
the word ________ is defined as an enlarged heart - answer✔✔cardiomegaly
a constant twitching at a rate so high that true heartbeats do not occur is known as -
answer✔✔fibrillation
in a ________ block, only one of every two impulses from the SA node makes it through the AV
node to the ventricles - answer✔✔2:1
the zone of cardiac muscle death where action potentials cannot be generated is known as the -
answer✔✔ischemic zone
when the atria contract more frequently than the ventricles it is known as - answer✔✔atrial
flutter
this form of arrhythmia is characterized by the presence of a delta wave prior to the QRS
complex - answer✔✔Wolff-Parkinson White Syndrome
local anesthetic given by IV that has been found to be useful in treating arrhythmias -
answer✔✔lidocaine
this class of drugs decreases the heart rate and decreases the force of contraction -
answer✔✔beta adrenergic blocking agents
these drugs have their site of action in the renal tubules and cause sodium loss with a resultant
water loss - answer✔✔thiazide diuretics
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