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D3 Nervous Control of the Cardiac Cycle Reorder

Target Level

Pass

Running Total

Attempt

1 of 3

Drag and drop the boxes into the correct order.

Rearrange the the stages of conduction that control the cardiac cycle.

The electrical impulse continues its path to the bundle of His.
This structure extends around the ventricular walls, resulting in ventricular depolarisation (i.e. systole).
The frequency of these depend on activation of the sympathetic nervous system (i.e. increase in firing rate via the splanchnic nerve).
The role of this is to conduct the impulse to the Purkinjie fibres.
Or activation of the parasympathetic nervous system (i.e. reduced firing rate via the vagus nerve).
The role of this node is to delay ventricular contraction, which allows the ventricles to fill fully before contraction (i.e diastole).
The sino-atrial node acts as a pacemaker which generates electrical impulses.
Whichever system is activated, the electrical impulse causes the atria to contract (i.e. atrial depolarisation).
The electrical impulse travels to the atrioventricular node, which is located in the lower part of the right atrial wall, next to the septum.

This is your 1^st attempt! The marking algorithm gives more marks for getting the right order first time.

Pass Mark

70%