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Question: afterload
Choices:
force the ventricles must develop to effectively pump blood against the resistance in the vessels
Question: atrioventricular (AV) node
Choices:
clump of myocardial cells located in the inferior portion of the right atrium within the atrioventricular septum; receives the impulse from the SA node, pauses, and then transmits it into specialized conducting cells within the interventricular septum
Question: anterior interventricular artery
Choices:
(also, left anterior descending artery or LAD) major branch of the left coronary artery that follows the anterior interventricular sulcus
Question: anastomosis
Choices:
(plural: anastomoses) area where vessels unite to allow blood to circulate even if there may be partial blockage in another branch
Question: aortic valve
Choices:
(also, aortic semilunar valve) valve located at the base of the aorta
Question: atrioventricular bundle
Choices:
(also, bundle of His) group of specialized myocardial conductile cells that transmit the impulse from the AV node through the interventricular septum; form the left and right atrioventricular bundle branches
Question: anterior interventricular sulcus
Choices:
sulcus located between the left and right ventricles on the anterior surface of the heart
Question: anterior cardiac veins
Choices:
vessels that parallel the small cardiac arteries and drain the anterior surface of the right ventricle; bypass the coronary sinus and drain directly into the right atrium
Question: atrioventricular bundle branches
Choices:
(also, left or right bundle branches) specialized myocardial conductile cells that arise from the bifurcation of the atrioventricular bundle and pass through the interventricular septum; lead to the Purkinje fibers and also to the right papillary muscle via the moderator band
Question: artificial pacemaker
Choices:
medical device that transmits electrical signals to the heart to ensure that it contracts and pumps blood to the body
Question: atrial reflex
Choices:
(also, called Bainbridge reflex) autonomic reflex that responds to stretch receptors in the atria that send impulses to the cardioaccelerator area to increase HR when venous flow into the atria increases