Heart & ECG Lab With complete solution graded.

Heart & ECG Lab With complete solution graded.How many chambers does the heart consist of? - ANSWER4 Which ventricle pumps blood through the aorta to the body? - ANSWERleft ventricle What is the correct order the flow of blood entering the heart from the systemic circulation through the venae cava? - ANSWER1. 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: - ANSWERleft atrium and ventricle The electrical impulse is delayed in the AV node before propagating to the bundle of His. During this delay the _________ contract - ANSWERatria ________ is the phase of the cardiac cycle when the heart is relaxing - ANSWERdiastole A cardiac cycle covers the events that occur from the beginning of one heart beat to the beginning of the next - ANSWERtrue _________ impulses stimulate cardiac muscle to contract - ANSWERelectrical After contracting, the heart relaxes. This happens because of an electrical change called ___________ - ANSWERrepolarization What does an ECG measure? - ANSWERelectrical impulses The electrical activity that occurs in the heart when it contracts and relaxes can be recorded, and is called a(n) _________ - ANSWERelectrocardiogram What is the function of the four heart valves? - ANSWERthey allow the blood to flow in only one direction through the heart Which valves are located between the atria and the ventricles? - ANSWERatrioventricular (AV) valves