Chapter 13: Heart
The ventricles and and Atria can be in systole at the same time?
False
A single cardiac cycle usually takes about 2 seconds true or false
False .8 seconds
The AV valves and semilunar valves are open at the same time true or false
False when the AV valves are open, semilunar valves are closed: when semilunar valves are open AV valves are closed
Left atrium leads to
Bicuspid or mitral valve
What state are the ventricles in when the AV valves are open?
Ventricular diastole
When do the semilunar valves open?
When pressure in the ventricles is greater than that in the arteries
At the beginning of ventricular diastole what position are the AV valves in?
AV valves are closed
What is the position of the valves during ventricular filling?
AV valves are open; semilunar valves are closed
The period of contraction is called systole true or false
True
Aortic valve leads to
Aorta
Left ventricle leads to
Aortic valve
In the cardiovascular system what vessels are the site of nutrient, gas and waste Exchange?
Capillaries
What is it called when the AV valves open, causing ventricular filling, making ventricular systole begin, with ventricular pressure rising, causing AV valves to close, semilunar valves open, ejection of blood, ventricular systole begins, semilunar valves close, and ventricular pressure Falls?
Cardiac cycle in order
Pulmonary vein leads to
Left atrium
Bicuspid or mitral valve leads to
Left ventricle
Pulmonary artery leads to
Lungs
What is the function of the chordae tendineae?
Prevent the cusps of the AV valves from opening back into the atrium
Left atrioventricular valve and bicuspid valve
Prevents backflow of blood to the left atrium
Right atrioventricular valve and tricuspid valve
Prevents backflow of blood to the right atrium
Pulmonary trunk leads to
Pulmonary artery
Pulmonary valve leads to
Pulmonary trunk
Right ventricle leads to
Pulmonary valve
Lungs leads to
Pulmonary vein
Right semilunar valve and pulmonary valve
Reduces backflow of blood from the pulmonary circuit
Aortic valve and left semilunar valve
Reduces backflow of blood from the systemic circuit
Vena cava leads to
Right atrium
Tricuspid valve leads to
Right ventricle
The ____________ ventricle pumps blood to the pulmonary circuit, while the _________ pumps blood to the systemic circuit.
Right; left
What structure is also known as the pacemaker of the heart?
SA node
List the order of the cardiac conduction system in order following the path of the electrical impulse
SA node; atrial syncytium, junctional fibers, AV node, AV bundle, bundle branches, Purkinje Fibers, ventricular syncytium
When the first heart sound is heard what is occurring with the heart valves?
The AV valves are closing
What occurs after ventricular systole begins?
The AV valves close and the semilunar valves open
What wave in an ECG tracing depicts ventricular repolarization?
The T wave
What is systolic pressure?
The maximum pressure achieved during ventricular contraction
Right atrium leads to
Tricuspid valve