CET Cardiac Anatomy & Physiology

Question 1

What is the primary function of the heart?

Accepted Answer

To pump blood throughout the body

Answer

The heart is a vital muscular organ that functions as the central pump of the circulatory system. Its primary role is to continuously pump oxygenated blood and essential nutrients to every cell, tissue, and organ throughout the body. Simultaneously, it receives deoxygenated blood and sends it to the lungs to be re-oxygenated.

Question 2

Which chamber of the heart receives oxygen-poor blood from the body?

Accepted Answer

Right atrium

Answer

The right atrium is the upper right chamber of the heart, specifically designed to receive deoxygenated (oxygen-poor) blood. This blood returns from the entire body through the superior and inferior vena cava. From the right atrium, the blood then moves into the right ventricle, which pumps it to the lungs for oxygenation.

Question 3

What separates the left and right sides of the heart?

Accepted Answer

The septum

Answer

The septum is a crucial muscular wall that divides the heart into its left and right sides. This anatomical separation is vital because it prevents the mixing of oxygenated blood from the left side with deoxygenated blood from the right side. This ensures efficient and distinct circulatory pathways for blood going to the lungs and blood going to the rest of the body.

Question 4

Which valve is located between the left atrium and left ventricle?

Accepted Answer

Mitral valve

Answer

The mitral valve, also known as the bicuspid valve, is strategically located between the left atrium and the left ventricle. Its essential function is to ensure a one-way flow of oxygenated blood from the left atrium into the left ventricle. It closes tightly to prevent any backflow of blood into the atrium when the left ventricle contracts to pump blood to the body.

Question 5

What is the function of the sinoatrial (SA) node?

Accepted Answer

To initiate the heartbeat

Answer

The sinoatrial (SA) node is often referred to as the heart's natural pacemaker. Located in the right atrium, it spontaneously generates electrical impulses that initiate each heartbeat. These impulses spread across the atria, causing them to contract, and then travel to the ventricles, coordinating the rhythmic pumping action of the heart.

(CET) Certified Electrocardiogram Technician Practice Test

(CET) Certified Electrocardiogram Technician Practice Test

CET Cardiac Anatomy & Physiology