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WorksheetsInitiation of heartbeat in mammalian heart (SB025)
Total questions: 13
Worksheet time: 19mins
Which one is NOT correct about Sinoatrial node?
As pacemaker
Initiate the heartbeat
Generate impulse and spread it to wall of both atrium
Delay impulse from spreading to wall of atria & ventricles simultaneously.
Which one is NOT correct about Atrioventricular node?
Spread impulse to Bundle of His, branches of Bundle of His to the apex of heart and to Purkinje fibers.
Delay the impulse from SA node for about 0.1 second
Generate impulse and spread it to wall of both atrium
Allow the ventricles to contract
The contraction of the atria is controlled by the:
SA node
AV node
Purkinje fibres
Bundle of His
What area of the heart is responsible for the delay of conduction between the atrium and ventricles?
Right bundle branch
AV node
Bundle of his
Bachmann bundle
Which label is representing the SA node?
A
C
D
E
Which label is representing the left & right branches of Bundle of His?
A
C
D
E
What is the important of the delay of impulse conduction between the atrium and ventricles?
To allow the atria to relax, all blood from atria pumped into ventricles, hence atria will empty completely.
To allow the ventricles to contract, pump all blood from atria into ventricles, hence atria will empty completely.
To allow atria to contract, all blood from atria pumped into ventricles, hence atria will empty completely.
Which label is representing the Bundle of His?
A
C
D
E
What area of the heart is responsible for the contraction of atria and allow atria to empty completely before ventricles contract?
Right bundle branch
AV node
Bundle of his
SA node
