BIO 392 Exam 3 UPDATED ACTUAL Exam Questions and CORRECT Answers Left ventricular pressure is higher than pressure in the aorta during - CORRECT ANSWER - ventricular systole only
Which event happens at the start of a cardiac cycle? The SA node fires. - CORRECT ANSWER - The P wave develops.
What causes the aortic semilunar valve to close? - CORRECT ANSWER - greater pressure in the aorta than in the left ventricle
Place these structures in the order that blood returning to the heart from the body would pass through them.
- right ventricle
- left atrium
- right atrium
- pulmonary artery
- left ventricle
- pulmonary vein - CORRECT ANSWER - 3, 1, 4, 6, 2, 5
A semilunar valve that has the right ventricle on one side - CORRECT ANSWER - pulmonary valve
In order for blood to enter the heart, - CORRECT ANSWER - the atria must not only be at rest but the atrial pressure must be lower than the veins
During ventricular ejection, - CORRECT ANSWER - the ventricles are in systole.
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Place these structures in the order that blood returning to the heart from the body would pass through them.
- right ventricle
- left ventricle
- pulmonary vein
- pulmonary artery
- left atrium
- right atrium - CORRECT ANSWER - 6, 1, 4, 3, 5, 2
Which has a longer duration of action - CORRECT ANSWER - ventricular diastole
An AV valve that has three flaps - CORRECT ANSWER - tricuspid valve
During exercise, which has a shorter duration of action compared to resting condition? - CORRECT ANSWER - Both ventricular diastole and ventricular systole
Also called the mitral valve - CORRECT ANSWER - bicuspid valve
Increased pressure in the ventricles would close what valve(s)? - CORRECT ANSWER - AV valves only
An AV valve that has three flaps - CORRECT ANSWER - the right AV valve
The amount of blood left in the ventricle after it contracts - CORRECT ANSWER - end- systolic volume (ESV)
Which of the following events result in the first heart sound? - CORRECT ANSWER - the AV valves close
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Which of the following is correct about the filling of the ventricles? - CORRECT ANSWER - Most blood flows passively unto the ventricles through open AV valves.
The volume of blood ejected from each ventricle during a contraction is called the - CORRECT ANSWER - stroke volume
During exercise, the ___ will be lower - CORRECT ANSWER - the end-systolic volume
has three cuplike leaflets and has the aorta on one side - CORRECT ANSWER - aortic valve
Describe the pressures in the atria and ventricles that would cause the opening of the AV valves.
- CORRECT ANSWER - Pressure in the atria would be greater than the pressure in the
ventricles.
In which situation would the stroke volume be the greatest? - CORRECT ANSWER - when venous return is increased
The AV node - CORRECT ANSWER - Delay(s) occurs here while atria contract
Internodal pathways: - CORRECT ANSWER - Link(s) between the SA node and AV node
Match the following even with the correct phase of an ECG. Ventricular depolarization - CORRECT ANSWER - QRS complex
Bundle branches: - CORRECT ANSWER - Convey(s) the impulse down the interventricular septum
The ___ is immediately followed by the atrial contraction - CORRECT ANSWER - P wave
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