CMT Cardiac Anatomy and Physiology

Question 1

What is the primary function of the heart's left ventricle?

Accepted Answer

Pumps oxygenated blood to the entire body.

Answer

The left ventricle is the strongest and most muscular chamber of the heart, essential for systemic circulation. Its primary function is to pump oxygenated blood, received from the left atrium, into the aorta. From the aorta, this blood is then distributed under high pressure to all tissues and organs throughout the entire body, supplying them with vital oxygen and nutrients.

Question 2

What does the sinoatrial (SA) node do in the heart's conduction system?

Accepted Answer

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 the contraction of the atria. These impulses then propagate through the heart's conduction system, effectively setting the rhythm and rate of the entire heartbeat.

Question 3

Which of the following is a common symptom of cardiac arrhythmia?

Accepted Answer

Dizziness and palpitations.

Answer

Cardiac arrhythmias disrupt the heart's normal pumping efficiency, leading to reduced blood flow to the brain and body. This decreased perfusion often manifests as dizziness due to inadequate cerebral blood supply. Palpitations, or the sensation of a racing, pounding, or skipped heartbeat, are a direct result of the irregular electrical activity within the heart itself.

Question 4

What is the function of the coronary arteries?

Accepted Answer

Supply blood to the heart muscle.

Answer

The coronary arteries are vital blood vessels that branch off the aorta and encircle the heart. Their primary function is to deliver oxygen-rich blood and essential nutrients directly to the heart muscle (myocardium). This continuous supply is crucial for the heart to maintain its tireless pumping action and overall function.

Question 5

Which blood vessel carries deoxygenated blood from the heart to the lungs?

Accepted Answer

Pulmonary artery.

Answer

The pulmonary artery is unique among arteries because it carries deoxygenated blood. It originates from the right ventricle of the heart and transports this blood to the lungs. In the lungs, the blood releases carbon dioxide and picks up oxygen, becoming oxygenated before returning to the heart via the pulmonary veins.

(CMT) Certified Cardiac Monitor Technician Practice Test

(CMT) Certified Cardiac Monitor Technician Practice Test

CMT Cardiac Anatomy and Physiology