Exam 20: The Heart

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the circle labeled "5" on the graph?

Oxygen is added to blood as it flows through the ________ circuit.

The P wave of the electrocardiogram is a signal from

In-Text Figure Based Questions -The ________ side of the heart supplies blood to the systemic circuit, while the ________ side of the heartsupplies blood to the pulmonary circuit. (Figure 20-1)

Abnormally slow depolarization of the ventricles would most change the shape of the ________ in an ECG tracing.

Calculate cardiac output if the heart rate is 125 beats/minute, the end-diastolic volume is 130 ml, andthe end-systolic volume is 40 ml.

Coronary veins empty into the

The cusps (leaflets) of atrioventricular valves attach directly to

Which of the following are involved in the pulmonary circuit?

If there is a complete block between the SA node and the AV node, how would the ECG be affected?

In-Text Figure Based Questions -Which division of the autonomic nervous system would increase heart rate? (Figure 20-21)

Cardiac cells damaged by infarction will show all of the following except

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What is occurring in the left atrium at the circle labeled "2" on the graph?

John encounters a bear while hiking. His heart will respond in all of the following ways except

Gradual drifting of membrane potential toward threshold in autorhythmic cells is termed a

The following are structural components of the conducting system of the heart. 1) Purkinje fibers 2) AV bundle 3) AV node 4) SA node 5) bundle branches The sequence in which excitation would move through this system is

Most of the middle layer in the heart wall is composed of

The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.

The great and middle cardiac veins drain blood into the

The ________ circuit carries blood to and from the lungs.