Bio 169 Exam Study Guide with
Complete Solutions
papillary muscles - Answer️️ -extend from the endocardium of both ventricles and are
attached to the cusps of the right and left valves
right bundle branch - Answer️️ -is a bifurcation of conduction myofibrils at the
interventricular sep...
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
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