Cardiac Anatomy & Physiology Flashcards
7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Cardiac Anatomy & Physiology flashcards as text
Which vessel carries oxygenated blood from the lungs to the heart?
Answer: Pulmonary vein
The pulmonary veins (four total) return oxygenated blood from the lungs to the left atrium.
The Bundle of His divides into which two structures?
Answer: Left and right bundle branches
The Bundle of His splits into the left and right bundle branches, which conduct impulses down the interventricular septum.
What is the normal intrinsic firing rate of the AV node?
Answer: 40–60 bpm
The AV node has an intrinsic escape rate of 40–60 bpm and serves as a backup pacemaker if the SA node fails.
Which chamber of the heart has the thickest myocardial wall?
Answer: Left ventricle
The left ventricle has the thickest walls because it must generate enough pressure to pump blood through the systemic circulation.
The T wave on an ECG represents which electrical event?
Answer: Ventricular repolarization
The T wave reflects ventricular repolarization, during which the ventricular myocardium resets for the next contraction.
Which autonomic nervous system division increases heart rate?
Answer: Sympathetic
Sympathetic stimulation releases norepinephrine, which binds to beta-1 receptors and increases heart rate and contractility.
The interventricular septum primarily separates which two chambers?
Answer: Left and right ventricles
The interventricular septum is the muscular wall that divides the left and right ventricles.