16 Questions
Where does the left side of the heart pump blood through?
Body systemically
Which part of the heart is directed inferiorly to the left?
Apex
What is the purpose of pulmonary circulation?
Pick up oxygen and unload carbon dioxide in the lungs
Where is the heart located within the thoracic cavity?
Mediastinum
What type of circulation does the right side of the heart perform?
Pulmonary circulation
Which part of the thoracic cavity houses the heart?
Mediastinum
What is the function of systemic circulation?
Deliver nutrients and oxygen to body tissues
Which direction is the base of the heart positioned?
Superiorly to the right
What sets the rhythm of electrical excitation in the heart's conduction system?
Sinoatrial (SA) node
Which part of the heart is located in the interventricular septum?
Atrioventricular (AV) node
During which phase of the action potential does depolarization occur in cardiac muscle cells?
Resting phase
What leads to the mechanical response of cardiac muscle contraction?
Depolarization
Which structure ensures that the heart chambers contract in a coordinated manner?
Purkinje fibers
What is the primary source of ATP for cardiac muscle cells?
Aerobic cellular respiration
Which channels open during the plateau phase of the action potential in cardiac muscle cells?
Ca2+ channels
What happens during repolarization in cardiac muscle cells?
K+ channels open and ions outflow from the cell
This quiz covers the overview of coronary circulation, including the branching of right and left coronary arteries, the formation of anastomoses, the function of coronary capillaries, and the role of coronary veins in collecting oxygen-poor blood. Test your knowledge on the blood supply to the myocardium of the heart.
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