Heart Contraction

Drag and drop each label to its correct position

c

f

d

e

b

a

purkinge fibers

SA node

bundle branch

pulmonary artery

Bundle of His

AV node

Tags

NGSS.MS-LS1-3

The diagram is of

• contraction of the ventricles

• contraction of the atria

• relaxing of the entire heart

• the valves that leave the atria

What is the main function of the electrical conduction system in the heart?

• Filter and purify blood in the heart

• Coordinate and regulate the heartbeat

• Transport oxygen to the heart muscles

• Generate electrical impulses for muscle contraction

Which part of the heart receives the electrical impulses for a contraction?

• Pulmonary artery

• Atria

• Ventricles

• SA node

What is the name of the specialized group of cells that acts as the natural pacemaker of the heart?

• bundle of His

• sinoatrial node

• atria

• ventricles

Tags

NGSS.HS-LS1-3

What is the correct sequence of the electrical conduction system in the heart?

• SA node -> AV node -> Bundle of His -> Purkinje fibers

• AV node -> SA node -> Bundle of His -> Purkinje fibers

• SA node -> AV node -> Purkinje fibers -> Bundle of His

• SA node -> AV node -> Bundle of His -> Atria

What happens during the P segment on an electrocardiogram (ECG)?

• contraction of the atria

• contraction of the ventricles

• relaxing of the atria

• Relaxation of the ventricles

What is the significance of the diastole of the heart at the end of electrical conduction?

• The relaxation phase is not significant in the electrical conduction system of the heart.

• The relaxation phase allows the heart muscle cells to reset and prepare for the next contraction.

• The relaxation phase is responsible for the initiation of the electrical impulse in the heart.

• The relaxation phase helps in the heart pre-contract for the next heartbeat.

Tags

NGSS.HS-LS1-3

What is the role of the Purkinje fibers in the electrical conduction system?

• They produce hormones that control heart rate.

• They conduct electrical impulses throughout the ventricles of the heart.

• They regulate blood flow in the arteries.

• They conduct electrical impulses throughout the atria of the heart.

What is the name for the blue "strings" in the heart diagram?

• bicuspid valve

• pulmonary artery

• cordinae tentonae

• purkinge fibers