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When carotid and aortic baroreceptors reduce their output,

Stimulation of the aortic baroreceptors reflexively results in

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: What occurs at the circled label “5” on the graph?

The muscular layer in the wall of a blood vessel is the tunica

Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute.

________ is when the heart can’t maintain adequate cardiac output.

The _____ collect blood directly from capillary beds.

A heart murmur might be caused by

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: What occurs at the area labeled “C” on the graph?

In what order would excitation move through the conducting system of the heart?