MATCHING
Match term with correct characteristic.
-Volume of blood in the ventricle before it contracts
A)gap junction
B)funny channels
C)functional syncytium
D)EDV
E)papillary muscles
F)second heart sound

Question

Quizplus · Accepted Answer

EDV stands for End-Diastolic Volume, which refers to the amount of blood in the ventricle before it contracts.

Answer: E 
 Papillary muscles are small muscles in the ventricles of the heart that attach to the chordae tendineae, which in turn connect to the heart valves. Their contraction helps prevent the valves from flipping inside out during ventricular contraction.

Answer: A 
 Gap junctions are specialized protein channels that allow for electrical and chemical communication between adjacent cells. They are important for coordinated contraction of cardiac muscle cells.

Answer: B 
 Funny channels (also known as pacemaker channels) are ion channels that allow for the movement of ions such as sodium and potassium into and out of cardiac muscle cells. They play a key role in establishing and maintaining the heart's rhythmic contractions.

Answer: C 
 Functional syncytium refers to the fact that cardiac muscle cells are interconnected via gap junctions, allowing them to function as a single coordinated unit during contraction.

Answer: F 
 The second heart sound is the "dub" sound that can be heard shortly after the second heart beat. It is caused by the closure of the aortic and pulmonary valves at the end of systole (ventricular contraction).

MATCHING Match Term with Correct Characteristic