U7L6 - Heart Conduction

What is going on in the heart during the P wave

• SA node triggers depolarization in atria
• AV node triggers depolarization in ventricle, the main pumpung action
• Delay caused by the SA node
• Repolarization of the ventricle 

 This triggers contraction in the atria

• SA node
• AV node
• QT node
• AV Bundles

Blood pressure is greatest:

• when the heart is between contraction and relaxation.
• when the atria contract.
• when the ventricles contract.
• when the patient is lying down.

Tags

NGSS.HS-LS1-3

What does depolarization result in?

• relaxation

• contraction

• repulsion

• attraction

Which is the correct path of electrical impulses through the heart?

• SA → Purkinje Fibers → Bundle Branches → AV
• SA → AV → Bundle Branches → Purkinje Fibers
• AV → SA → Bundle Branches → Purkinje Fibers
• AV → Bundle Branches → SA → Purkinje Fibers

What is going on in the heart during the T-wave

• SA node triggers depolarization in atria
• AV node triggers depolarization in ventricle, the main pumpung action
• Delay caused by the SA node
• Repolarization of the ventricle 

 This triggers contraction in the ventricle

• SA node
• AV node
• QT node
• AV Bundles

A cardiac cycle is:

• ventricular relaxation

• ventricular contraction

• equivalent to 1 complete heart beat

• a heart attack