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

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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.
Gillian13990
Quiz by Gillian13990, updated more than 1 year ago
Gillian13990
Created by Gillian13990 about 9 years ago
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Resource summary

Question 1

Question
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.
Answer
  • True
  • False

Question 2

Question
The 'conducting (conduction) system' is made up of...
Answer
  • cardiac veins and coronary arteries
  • small groups of specialised neuromuscular cells

Question 3

Question
What normally initiates the heartbeat?
Answer
  • Internodal Pathways
  • SA (Sino-Atrial) Node
  • AV (Atrioventricular) Node
  • Bundle of His

Question 4

Question
Within which wall is the SA Node situated?
Answer
  • left atrium
  • right atrium
  • left ventricle
  • right ventricle

Question 5

Question
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.
Answer
  • True
  • False

Question 6

Question
The Bundle of His divides into how many branches?
Answer
  • 1
  • 2
  • 3
  • 4

Question 7

Question
The order in which the heartbeat impulse moves is...
Answer
  • 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

Question 8

Question
Which areas of the heart contract first?
Answer
  • Ventricles
  • Atria

Question 9

Question
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.
Answer
  • True
  • False

Question 10

Question
Which part of the conducting system is known as the 'pacemaker'?
Answer
  • Bundle of His
  • SA Node
  • AV Node
  • Purkinje Fibres

Question 11

Question
The rhythm of the pacemaker is known as...
Answer
  • sinus rhythm
  • circulatory rhythm
  • metabolised rhythm

Question 12

Question
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.
Answer
  • True
  • False

Question 13

Question
What does the P wave stand for on an ECG?
Answer
  • ventricular repolarisation
  • atrial repolarisation
  • atrial depolarisation

Question 14

Question
What does the 'QRS' complex stand for on an ECG?
Answer
  • atrial depolarisation
  • atrial repolarisation
  • ventricular depolarisation

Question 15

Question
What does the T wave stand for on an ECG?
Answer
  • atrial depolarisation
  • ventricular depolarisation
  • ventricular repolarisation

Question 16

Question
When the heart is in complete diastole (passive ventricular filling)...
Answer
  • the atrioventricular valves are open, the semilunar valves are shut
  • the atrioventricular valves are shut, the semilunar valves are open

Question 17

Question
During passive ventricular filling how much blood enters the ventricles?
Answer
  • 30%
  • 50%
  • 70%
  • 90%

Question 18

Question
During atrial systole, how much more blood enters the ventricles?
Answer
  • 20%
  • 30%
  • 40%
  • 50%

Question 19

Question
During atrial systole...
Answer
  • the atrioventricular valves are shut, the semilunar valves are open
  • the atrioventricular valves are open, the semilunar valves are shut

Question 20

Question
During ventricular systole...
Answer
  • the atrioventricular valves are shut, the semilunar valves are open
  • the atrioventricular valves are open, the semilunar valves are shu

Question 21

Question
During atrial systole, does the pressure within the atria and ventricles...
Answer
  • rise
  • fall

Question 22

Question
During ventricular diastole, the ventricular pressure is...
Answer
  • higher than that in the systemic and pulmonary arteries
  • lower than that in the systemic and pulmonary arteries

Question 23

Question
During ventricular diastole...
Answer
  • the semilunar valves are shut, the atrioventricular valves are open
  • the semilunar valves are open, the atrioventricular valves are shut

Question 24

Question
What is a typical heartbeat?
Answer
  • 60bpm
  • 75bpm
  • 80bpm
  • 95bpm

Question 25

Question
How long does each cardiac cycle take to complete, according to the heartbeat in the previous question?
Answer
  • 0.2secs
  • 0.4secs
  • 0.6secs
  • 0.8secs
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