How many chambers does the heart consist of? - ANSWER 4
Which ventricle pumps blood through the aorta to the body? - ANSWER left ventricle
What is
... [Show More] the correct order the flow of blood entering the heart from the systemic circulation through the venae cava? - ANSWER 1. right atrium
2. right ventricle
3. pulmonary trunk
4. pulmonary veins
5. left atrium
6. left ventricle
The mitral (or bicuspid) atrioventricular valve controls the flow between the: - ANSWER left atrium and ventricle
The electrical impulse is delayed in the AV node before propagating to the bundle of His. During this delay the _________ contract - ANSWER atria
________ is the phase of the cardiac cycle when the heart is relaxing - ANSWER diastole
A cardiac cycle covers the events that occur from the beginning of one heart beat to the beginning of the next - ANSWER true
_________ impulses stimulate cardiac muscle to contract - ANSWER electrical
After contracting, the heart relaxes. This happens because of an electrical change called ___________ - ANSWER repolarization
What does an ECG measure? - ANSWER electrical impulses
The electrical activity that occurs in the heart when it contracts and relaxes can be recorded, and is called a(n) _________ - ANSWER electrocardiogram
What is the function of the four heart valves? - ANSWER they allow the blood to flow in only one direction through the heart
Which valves are located between the atria and the ventricles? - ANSWER atrioventricular (AV) valves
Which valves are located between the exits of the ventricles and the two large arteries? - ANSWER semilunar valves
How are the sounds of a heartbeat created? - ANSWER by heart valves closing
What is happening in the heart during the second heart sound ("dupp")? - ANSWER semilunar valves are closing
The first heart sound, "lubb", is associated with the closing of which valves? - ANSWER atrioventricular (AV) valves
The first heart sound, "lubb" is heard when the AV valves close, and this is related to the _________ on an ECG - ANSWER QRS complex
At which point on an ECG is the second heart sound, "dupp", heard? - ANSWER the end of the T wave
At which point on an ECG is the first heard sound, "lubb", heard? - ANSWER during the QRS complex
The second heart sound "dupp" is heard when the semilunar valves close, and this is related to the ________ on an ECG - ANSWER end of the T wave
The semilunar valves are closing during ventricular _________ - ANSWER relaxation (diastole) [Show Less]