MATCHING
Match term with correct characteristic.
-Area of low electrical resistance that allows an action potential to spread from one cardiac cell to surrounding cells.
A)gap junction
B)funny channels
C)functional syncytium
D)EDV
E)papillary muscles
F)second heart sound

Question

Quizplus · Accepted Answer

Gap junctions allow for the direct transfer of electrical signals between cardiac cells, creating an area of low electrical resistance known as an electrical syncytium.

Answer: C 
 Functional syncytium refers to the coordinated contraction of cardiac muscle cells, which is possible due to the presence of gap junctions and the low electrical resistance of the cardiac tissue.

Answer: D 
 EDV (end-diastolic volume) refers to the amount of blood in the ventricles at the end of diastole, which is an important determinant of stroke volume and cardiac output.

Answer: E 
 Papillary muscles are small, finger-like projections of muscle that are attached to the chordae tendineae in the heart. They play a key role in preventing the backflow of blood into the atria during ventricular contraction.

Answer: F 
 The second heart sound (S2) is produced by the closure of the aortic and pulmonary valves at the end of systole. It is commonly described as a "dub" sound, and is a key component of the cardiac cycle.

MATCHING Match Term with Correct Characteristic