Cardiovascular conduction systemQuiz

What is the primary function of the cardiovascular system?

• To transport blood, nutrients, oxygen, hormones, and waste products throughout the body.

• To digest food.

• To control body temperature.

• To produce energy.

Identify the three major structures that make up the cardiovascular system.

• Heart, lungs, and brain.

• Heart, blood vessels, and blood.

• Heart, stomach, and intestines.

• Heart, liver, and kidneys.

What are the two major circuits of the cardiovascular system? Briefly describe each. Pulmonary circuit: ________ Systemic circuit: ________

• Pulmonary circuit: Carries oxygenated blood from the heart to the body. Systemic circuit: Returns deoxygenated blood to the heart.

• Pulmonary circuit: Carries deoxygenated blood from the right side of the heart to the lungs for oxygenation. Systemic circuit: Delivers oxygenated blood from the left side of the heart to the rest of the body.

• Pulmonary circuit: Delivers oxygenated blood from the left side of the heart to the rest of the body. Systemic circuit: Carries deoxygenated blood from the right side of the heart to the lungs for oxygenation.

Describe the role of the left side of the heart in the circulatory process.

• It pumps oxygenated blood from the lungs to the rest of the body through the systemic circuit.

• It pumps deoxygenated blood to the lungs.

• It digests food.

• It controls breathing.

List the three layers of tissue that make up the heart and provide a brief description of each. Epicardium: ________ Myocardium: ________ Endocardium: ________

• Epicardium: The outer layer that protects the heart and reduces friction. Myocardium: The thick, muscular middle layer responsible for contracting and pumping blood. Endocardium: The inner layer lining the heart chambers and valves.

• Epicardium: The inner layer lining the heart chambers and valves. Myocardium: The outer layer that protects the heart and reduces friction. Endocardium: The thick, muscular middle layer responsible for contracting and pumping blood.

• Epicardium: The thick, muscular middle layer responsible for contracting and pumping blood. Myocardium: The inner layer lining the heart chambers and valves. Endocardium: The outer layer that protects the heart and reduces friction.

What are the three main types of blood cells, and what are their functions?

• Red blood cells transport oxygen and carbon dioxide.

• White blood cells defend against infections.

• Platelets assist in blood clotting.

• All of the above.

Identify the four main stations of the heart's electrical conduction pathway.

• Sinoatrial (SA) node, Atrioventricular (AV) node, Bundle of His, Purkinje fibers.

• Aorta, Vena Cava, Pulmonary Artery, Pulmonary Vein.

• Left Atrium, Right Atrium, Left Ventricle, Right Ventricle.

What is the function of the SA node, and why is it referred to as the pacemaker?

• It initiates electrical impulses that regulate the heartbeat.

• It pumps blood throughout the body.

• It filters waste from the blood.

How does the body ensure that metabolic waste is removed from cells?

• Waste products are transported by blood to the kidneys, liver, or lungs for excretion.

• Waste products are stored in the muscles.

• Waste products are converted into energy.

The heart has its own electrical conduction system, initiated by the _________.

• sinoatrial (SA) node

• atrioventricular (AV) node

• Purkinje fibers