The right side of the heart pumps blood through vessels to the lungs and back to the left side of the heart through the __________ circulation.
The left side of the heart pumps blood through the __________ circulation, which delivers oxygen and nutrients to all the remaining tissues of the body.
Which of the following is a CORRECT order of blood flow through the heart?1 - right atrium 2 - left atrium 3 - right ventricle 4 - left ventricle 5 - vena cava 6 - pulmonary artery 7 - pulmonary vein 8 - tricuspid AV valve 9 - bicuspid (mitral) AV valve 10 - pulmonary valve 11 - aortic valve 12 - aorta
5, 1, 8, 3, 10, 6, 7, 2, 9, 4, 11, 12
When blood is flowing out of the left ventricle the bicuspid valve is __________ and the aortic semilunar valve is __________.
When blood is flowing into the left ventricle the bicuspid valve is __________ and the aortic semilunar valve is __________.
What happens in each 5 phases of cardiac muscle?
1. Depolarization- Voltage gated sodium channels open 2. Initial Re-polarization- Sodium channels close and loss of potassium. 3. Plateau- Calcium channels open and calcium rushes in and neutralizes the effect of outgoing potassium. 4. Final Re-polarization- calcium channels close and loss of potassium continues 5. RMP- Cell returns to resting membrane potential
During the depolarization phase of cardiac muscle
voltage-gated sodium channels open.
During the early repolarization and plateau phases of cardiac muscle
voltage-gate potassium channels open.
During the final repolarization phase of cardiac muscle
voltage-gated calcium channels are closed.
During __________ all of the valves are closed as pressure builds in the ventricles.
the period of isovolumetric contraction
During __________ all of the valves are closed as ventricles begin diastole.
the period of isovolumetric relaxation
In the heart, an action potential originates in the
The sequence of travel by an action potential through the heart is