Free Printable Heart part 2 (EKG)

Worksheets

Heart part 2 (EKG)

Total questions: 15

Worksheet time: 12mins

Name

Class

Date

The pacemaker of the heart

AV node

SA node

Bundle of His

Bundle branches

Which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart?

AV node, Bundle of His, SA node, Purkinje fibers, bundle branches

SA node, AV node, Bundle of His, bundle branches, Purkinje fibers

SA node, Bundle of His, AV node, Purkinje fibers, bundle branches

SA node, Bundle of His, bundle branches, Purkinje fibers, AV node

Which label is representing the Purkinje fibers?

Which part of the ECG corresponds to the repolarization of the ventricle?

P wave

QRS complex

T wave

none of the above

Place the following in the correct order:
1.atria contract
2. AV node
3. Bundle of His
4.Purkinje fibers
5. SA node
6. ventricles contract

5, 1, 2, 3, 4, 6

2, 1, 5, 3, 4, 6

5, 6, 2, 3, 4, 1

2, 6, 5, 3, 4, 1

The P wave of an ECG represents

atrial repolarization

atrial depolarization

ventricular repolarization

ventricular depolarization

Which of the following is a difference between cardiac muscle and skeletal muscle?

unlike skeletal muscle cells, cardiac muscle cells do not rely on an influx of calcium ions for depolarization

unlike skeletal muscle, cardiac muscle is not striated

unlike skeletal muscle, cardiac muscle does not use a sliding filament mechanism for contraction

unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic

Which is the pace maker of the heart

sinoatrial SA node

Purkinje fibers

atrioventricular AV node

atrioventricular AV bundle

bundle branches

The T wave corresponds to what event in the heart?

repolarization of the atria

depolarization of the atria

repolarization of the ventricles

depolarization of the ventricles

10.

What initiates the heart beat?

The brain

The AVN

Hormones such as adrenaline

The SAN

11.

What is likely to occur if there is a blockage of a coronary artery

Stroke

Heart attack

Diabetes

Drop in blood pressure

12.

Intercalated discs contain gap junctions which are protein-lined tunnels, allow direct transmission of the depolarizing current from cell to cell, across the chambers of the heart, so that the cells contract in unison.

True

False

13.

Tetany is the involuntary contraction of muscles. It does not happen in heart muscles because of

Ca++ influx

Na+ influx

K+ influx

14.

After an action potential the cardiac cell is unable to initiate another action potential for some time duration refractory period. That is why Tetany the involuntary contraction of muscles does not happen in heart muscles

True

False

15.

Atrial fibrillation is caused the failure of AV node

True

False

Reset

Heart part 2 (EKG)

Total questions: 15

Worksheet time: 12mins

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