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