e great cardiac vein and middle candiac vein empty into a vea A. pulm onary vein
ID: 3165645 • Letter: E
Question
e great cardiac vein and middle candiac vein empty into a vea A. pulm onary vein venous cavity ealled the B inferioe vena cava. C, superior vena cava D, coronary sinus. E. coronary artery 25. The right side of the heart acts as a pump for the A. pulmonary circulation. B. systemic circulation C. coronary circulation. D. hepatic portal circulation. E. cerebral circuit. 26. The chordae tendineae A. connect the atria to the ventricles. B. are found in the interventricular septurn. C. are part of the conducting system of the heart D. connect the flaps of the AV valves to the papillary muscles. E. are a part of the myocardium 27. The skeleton of the heart A. helps to support the coronary arteries. B. anchors cardiac muscle fibers. C, contains osseous tissue. D. prevents the backflow of blood in the heart. E. stimulates the myocardium. 28. These vessels empty blood into the left atrium. A. aorta B. right atrium C. pulmonary trunk D. pulmonary arteries E. pulmonary veins 29. Action potentials pass from one myocardial cell to another through areas of low electrical resistance called A. gap junctions. B. fibrous heart rings. C. electromagnetic discs. D. sarcolemma sclerotic plaques. E. tight junctions. 30. The "pacemaker" of the heart is the A. right bundle branch. B. left bundle branch. C. AV node. D. SA node. E. PM node.Explanation / Answer
24) The great cardiac vein and middle cardiac vein empty into a venous cavity called the
ANSWER IS: coronary sinus
EXPLANATION:
The coronary sinus collects blood from the heart muscle and delivers less-oxygenated blood to the right atrium.
25) the right side of the heart acts as pump for the
ANSWER Is :pulmonary circulation
EXPLANATION:
It receives deoxygenated blood from the body and sends it to the lungs for oxygenation.
26) The chordae tendineae
ANSWER IS:
connect the flaps of the AV valves to the papillary muscles.
EXPLANATION:
Chordae tendineae connect the papillary muscles to the tricuspid valve and the mitral valve in the heart. It holds the atrioventricular valves while the heart is pumping blood.
27) The skeleton of the heart
ANSWER is: anchors cardiac muscle fibres.
EXPLANATION:
The fibrous skeleton anchors cardiac muscle fibers. Cardiac muscle tissue pump blood into the vessels of the circulatory system.
28) These vessels empty blood into the left atrium.
ANSWER IS: pulmonary veins
29)Action potentials pass from one myocardial cell to another through areas of low electrical resistance called
ANSWER IS: gap junctions
30) The "pacemaker" of the heart is the
ANSWER IS: SA node
EXPLANATION:
The sinus node( SA node ) consists of a cluster of cells, situated in the upper part of the wall of the right atrium. The electrical impulses begins in SA node and cause heart to beat (contract).
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