How is defibrillation used to treat life-threatening cardiac conditions, and what is its mechanism?
IB Biology
How can artificial pacemakers regulate the heart rate, and in what situations are they used?
How can artificial pacemakers regulate the heart rate, and in what situations are they used?
What causes normal heart sounds, and how do changes in blood flow relate to the closure of the atrioventricular and semilunar valves?
What causes normal heart sounds, and how do changes in blood flow relate to the closure of the atrioventricular and semilunar valves?
How do conducting fibres ensure the coordinated contraction of the entire ventricle wall?
How do conducting fibres ensure the coordinated contraction of the entire ventricle wall?
How does this delay allow time for atrial systole before the atrioventricular valves close?
How does this delay allow time for atrial systole before the atrioventricular valves close?
What is the purpose of the delay between the arrival and passing on of a stimulus at the atrioventricular node?
What is the purpose of the delay between the arrival and passing on of a stimulus at the atrioventricular node?
Why can signals from the sinoatrial node not pass directly from the atria to the ventricles?
Why can signals from the sinoatrial node not pass directly from the atria to the ventricles?
How does the structure of cardiac muscle cells allow the propagation of stimuli through the heart wall?
How does the structure of cardiac muscle cells allow the propagation of stimuli through the heart wall?
How have scientific studies contributed to educating the public about “good” cholesterol (HDL), and how does it impact heart health?
How have scientific studies contributed to educating the public about “good” cholesterol (HDL), and how does it impact heart health?
What is the dual blood supply to the liver, and how do sinusoids differ from capillaries in the liver’s structure?
What is the dual blood supply to the liver, and how do sinusoids differ from capillaries in the liver’s structure?