2524623
Descrição
Quiz por Gillian13990, atualizado more than 1 year ago
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Criado por Gillian13990
mais de 9 anos atrás
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Questão 1
Questão
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.
Responda
- True
- False
Questão 2
Questão
The 'conducting (conduction) system' is made up of...
Responda
-
cardiac veins and coronary arteries
-
small groups of specialised neuromuscular cells
Questão 3
Questão
What normally initiates the heartbeat?
Responda
-
Internodal Pathways
-
SA (Sino-Atrial) Node
-
AV (Atrioventricular) Node
-
Bundle of His
Questão 4
Questão
Within which wall is the SA Node situated?
Responda
-
left atrium
-
right atrium
-
left ventricle
-
right ventricle
Questão 5
Questão
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.
Responda
- True
- False
Questão 6
Questão
The Bundle of His divides into how many branches?
Responda
-
1
-
2
-
3
-
4
Questão 7
Questão
The order in which the heartbeat impulse moves is...
Responda
-
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
Questão 8
Questão
Which areas of the heart contract first?
Responda
-
Ventricles
-
Atria
Questão 9
Questão
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.
Responda
- True
- False
Questão 10
Questão
Which part of the conducting system is known as the 'pacemaker'?
Responda
-
Bundle of His
-
SA Node
-
AV Node
-
Purkinje Fibres
Questão 11
Questão
The rhythm of the pacemaker is known as...
Responda
-
sinus rhythm
-
circulatory rhythm
-
metabolised rhythm
Questão 12
Questão
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.
Responda
- True
- False
Questão 13
Questão
What does the P wave stand for on an ECG?
Responda
-
ventricular repolarisation
-
atrial repolarisation
-
atrial depolarisation
Questão 14
Questão
What does the 'QRS' complex stand for on an ECG?
Responda
-
atrial depolarisation
-
atrial repolarisation
-
ventricular depolarisation
Questão 15
Questão
What does the T wave stand for on an ECG?
Responda
-
atrial depolarisation
-
ventricular depolarisation
-
ventricular repolarisation
Questão 16
Questão
When the heart is in complete diastole (passive ventricular filling)...
Responda
-
the atrioventricular valves are open, the semilunar valves are shut
-
the atrioventricular valves are shut, the semilunar valves are open
Questão 17
Questão
During passive ventricular filling how much blood enters the ventricles?
Responda
-
30%
-
50%
-
70%
-
90%
Questão 18
Questão
During atrial systole, how much more blood enters the ventricles?
Responda
-
20%
-
30%
-
40%
-
50%
Questão 19
Questão
During atrial systole...
Responda
-
the atrioventricular valves are shut, the semilunar valves are open
-
the atrioventricular valves are open, the semilunar valves are shut
Questão 20
Questão
During ventricular systole...
Responda
-
the atrioventricular valves are shut, the semilunar valves are open
-
the atrioventricular valves are open, the semilunar valves are shu
Questão 21
Questão
During atrial systole, does the pressure within the atria and ventricles...
Responda
-
rise
-
fall
Questão 22
Questão
During ventricular diastole, the ventricular pressure is...
Responda
-
higher than that in the systemic and pulmonary arteries
-
lower than that in the systemic and pulmonary arteries
Questão 23
Questão
During ventricular diastole...
Responda
-
the semilunar valves are shut, the atrioventricular valves are open
-
the semilunar valves are open, the atrioventricular valves are shut
Questão 24
Questão
What is a typical heartbeat?
Responda
-
60bpm
-
75bpm
-
80bpm
-
95bpm
Questão 25
Questão
How long does each cardiac cycle take to complete, according to the heartbeat in the previous question?
Responda
-
0.2secs
-
0.4secs
-
0.6secs
-
0.8secs
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