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Body Systems Quiz on The Cardiovascular System - Conducting System, The Cardiac Cycle & The Electrocardiogram (ECG), created by Gillian13990 on 17/04/2015.

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The Cardiovascular System - Conducting System, The Cardiac Cycle & The Electrocardiogram (ECG)

Question 1 of 25

1

It is important that the contraction of all the muscle cells of the heart wall is coordinated and synchronised so that the pumping action of the heart is both effective and efficient.

Select one of the following:

  • True
  • False

Explanation

Question 2 of 25

1

The 'conducting (conduction) system' is made up of...

Select one of the following:

  • cardiac veins and coronary arteries

  • small groups of specialised neuromuscular cells

Explanation

Question 3 of 25

1

What normally initiates the heartbeat?

Select one of the following:

  • Internodal Pathways

  • SA (Sino-Atrial) Node

  • AV (Atrioventricular) Node

  • Bundle of His

Explanation

Question 4 of 25

1

Within which wall is the SA Node situated?

Select one of the following:

  • left atrium

  • right atrium

  • left ventricle

  • right ventricle

Explanation

Question 5 of 25

1

There is a brief pause in the conduction of the impulse at the AV Node so that atrial contraction (and thus ventricular filling) is completed before ventricular contraction begins.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 25

1

The Bundle of His divides into how many branches?

Select one of the following:

  • 1

  • 2

  • 3

  • 4

Explanation

Question 7 of 25

1

The order in which the heartbeat impulse moves is...

Select one of the following:

  • Bundle of His, AV Node, SA Node, Bundle Branches, Purkinje Fibres

  • SA Node, Bundle of His, Purkinje Fibres, AV Node, Bundle Branches

  • SA Node, AV Node, Bundle of His, Bundle Branches, Purkinje Fibres

Explanation

Question 8 of 25

1

Which areas of the heart contract first?

Select one of the following:

  • Ventricles

  • Atria

Explanation

Question 9 of 25

1

Even though the SA Node normally initiates the heartbeat, the cells of the conducting system and of the heart muscle itself are also able to spontaneously depolarise and initiate a heartbeat.

Select one of the following:

  • True
  • False

Explanation

Question 10 of 25

1

Which part of the conducting system is known as the 'pacemaker'?

Select one of the following:

  • Bundle of His

  • SA Node

  • AV Node

  • Purkinje Fibres

Explanation

Question 11 of 25

1

The rhythm of the pacemaker is known as...

Select one of the following:

  • sinus rhythm

  • circulatory rhythm

  • metabolised rhythm

Explanation

Question 12 of 25

1

The conducting system requires no external stimulus to initiate or coordinate the heartbeat - this means that the heart shows 'autorhythmicity'. It can only be modified or regulated by other inputs such as hormones and nervous inputs.

Select one of the following:

  • True
  • False

Explanation

Question 13 of 25

1

What does the P wave stand for on an ECG?

Select one of the following:

  • ventricular repolarisation

  • atrial repolarisation

  • atrial depolarisation

Explanation

Question 14 of 25

1

What does the 'QRS' complex stand for on an ECG?

Select one of the following:

  • atrial depolarisation

  • atrial repolarisation

  • ventricular depolarisation

Explanation

Question 15 of 25

1

What does the T wave stand for on an ECG?

Select one of the following:

  • atrial depolarisation

  • ventricular depolarisation

  • ventricular repolarisation

Explanation

Question 16 of 25

1

When the heart is in complete diastole (passive ventricular filling)...

Select one of the following:

  • the atrioventricular valves are open, the semilunar valves are shut

  • the atrioventricular valves are shut, the semilunar valves are open

Explanation

Question 17 of 25

1

During passive ventricular filling how much blood enters the ventricles?

Select one of the following:

  • 30%

  • 50%

  • 70%

  • 90%

Explanation

Question 18 of 25

1

During atrial systole, how much more blood enters the ventricles?

Select one of the following:

  • 20%

  • 30%

  • 40%

  • 50%

Explanation

Question 19 of 25

1

During atrial systole...

Select one of the following:

  • the atrioventricular valves are shut, the semilunar valves are open

  • the atrioventricular valves are open, the semilunar valves are shut

Explanation

Question 20 of 25

1

During ventricular systole...

Select one of the following:

  • the atrioventricular valves are shut, the semilunar valves are open

  • the atrioventricular valves are open, the semilunar valves are shu

Explanation

Question 21 of 25

1

During atrial systole, does the pressure within the atria and ventricles...

Select one of the following:

  • rise

  • fall

Explanation

Question 22 of 25

1

During ventricular diastole, the ventricular pressure is...

Select one of the following:

  • higher than that in the systemic and pulmonary arteries

  • lower than that in the systemic and pulmonary arteries

Explanation

Question 23 of 25

1

During ventricular diastole...

Select one of the following:

  • the semilunar valves are shut, the atrioventricular valves are open

  • the semilunar valves are open, the atrioventricular valves are shut

Explanation

Question 24 of 25

1

What is a typical heartbeat?

Select one of the following:

  • 60bpm

  • 75bpm

  • 80bpm

  • 95bpm

Explanation

Question 25 of 25

1

How long does each cardiac cycle take to complete, according to the heartbeat in the previous question?

Select one of the following:

  • 0.2secs

  • 0.4secs

  • 0.6secs

  • 0.8secs

Explanation