Cardiac Conduction & Function

The study of cardiac conduction involves understanding how the heart ______.

• A) pumps blood

• B) conducts electrical impulses

• C) digests food

• D) filters waste

Which of the following is a function of the cardiovascular system?

• Delivering oxygen and nutrients

• Producing hormones

• Digesting food

• Absorbing minerals

The cardiovascular system helps in _______ by dilating or constricting blood vessels near the skin’s surface.

• Regulating body temperature

• Digesting food

• Producing energy

• Absorbing nutrients

Tags

NGSS.HS-LS1-3

What is the role of the Sinoatrial (SA) node in the cardiac conduction system?

• It acts as the heart's natural pacemaker

• It delays the electrical signal

• It conducts impulses to the ventricles

• It connects the atria and ventricles

Which part of the heart is responsible for initiating the cardiac conduction system?

• A) Atrioventricular node

• B) Sinoatrial node

• C) Bundle of His

• D) Purkinje fibers.

The P wave in an ECG represents the depolarization of the _______.

• ventricles

• atria

• sinoatrial node

• atrioventricular node

What does the T wave in an ECG represent?

• A) Electrical activity of the ventricles

• B) Electrical activity of the atria

• C) Electrical recovery of the ventricles

• D) Electrical activity of the brain.

The QRS complex in an ECG represents the ________.

• A) Electrical activity of the atria

• B) Electrical activity of the ventricles

• C) Electrical recovery of the ventricles

• D) Electrical activity of the brain.

What is the definition of the cardiac cycle?

• One complete heartbeat

• One complete breath

• One complete digestion

• One complete sleep cycle.

Tags

NGSS.HS-LS1-3

The cardiac cycle consists of two phases: systole and ______.

• Metastole

• Diastole

• Epistole

• Hypostole