A drug which decreases sodium ion conductance (leakage) in the Sino-atrial node would:

Significantly elevated aortic diastolic pressure would be expected to do which of the following?

Vagal stimulation:

Rank in descending order the spontaneous firing frequency of the following  tissues: (fastest to slowest)

Which of the following directly carries blood away from the left ventricle ?

The bicuspid valve is also known as the:

The myocardium receives its own blood supply from which of the following ?

The opening of the Aortic valve is initiated when the:

The mitral, tricuspid and both semilunar valves are all closed during which of the following?

The vagus nerve: