BIO 392 Exam 3 | Questions with Verified Answers Left ventricular pressure is higher than pressure in the aorta during A. ventricular systole only. B. atrial systole and ventricular systole C. ventricular diastole only. D. atrial systole only. E. All of the answers are correct. During ventricula...
Left ventricular pressure is higher than pressure in the aorta during
A. ventricular systole only.
B. atrial systole and ventricular systole
C. ventricular diastole only.
D. atrial systole only.
E. All of the answers are correct.
During ventricular systole, blood is entering the ventricles.
A. the atria are contracting.
B. the AV valves are closed.
C. the ventricles are relaxed.
D. the pressure in the ventricles declines.
Which blood vessels return blood to the heart?
A. capillaries
B. atria
C. veins
D. arteries
In order for blood to enter the heart,
A. the atria must not only be at rest but the atrial pressure must be lower than the veins.
B. the AV valves must be open.
C. the atria must be in diastole.
D. the pressure in the atria must be higher than in the veins.
E. All of the answers are correct.
The chambers of the heart that pump blood into the arteries are the
A. cusps.
B. atria.
C. ventricles.
D. chordae tendineae
Why does blood flow through the cardiovascular system? (proximate explanation)
,A. Because the heart establishes a pressure gradient
B. So that oxygen and nutrients can get to all parts of the body
C. Because cells need blood to survive
D. Because without blood flow a person could not survive
The term used to describe the amount of blood in the ventricle available to be pumped
out of the heart during the next contraction is
A. end-diastolic volume (EDV).
B. end-systolic volume (ESV).
C. heart rate (HR).
D. stroke volume (SV).
E. cardiac output (CO).
During the cardiac cycle,
A. the greatest increase in ventricular pressure occurs during the ejection phase.
B. the QRS complex of the ECG precedes the increase in ventricular pressure.
C. the P wave of the ECG occurs between the first and second heart sounds.
D. the third heart sound occurs during atrial systole.
Which event happens at the start of a cardiac cycle? The SA node fires.
A. The P wave develops.
B. The AV valves close.
C. Blood is ejected from the atrium.
D. Ventricular systole occurs.
The volume of blood ejected from each ventricle during a contraction is called the
A. cardiac output.
B. cardiac reserve.
C. end-systolic volume.
D. stroke volume.
E. end-diastolic volume.
During exercise, which has a shorter duration of action compared to resting condition?
A. Ventricular systole only
B. Both ventricular diastole and ventricular systole
C. Ventricular diastole only
During the isovolumic phase of ventricular systole,
A. blood is ejected into the great vessels.
B. the atrioventricular valves and semilunar valves are closed.
,C. the ventricles are relaxing.
D. the ventricles are filling with blood.
E. the atria contract.
The amount of blood left in the ventricle after it contracts
A. cardiac output (CO)
B. heart rate (HR)
C. end-diastolic volume (EDV)
D. stroke volume (SV)
E. end-systolic volume (ESV)
Place these structures in the order that blood returning to the heart from the body would
pass through them. 1. right ventricle; 2. left atrium; 3. right atrium; 4. pulmonary artery;
5. left ventricle; 6. pulmonary vein
A. 3, 1, 4, 6, 2, 5
B. 2, 5, 6, 4, 3, 1
C. 1, 3, 6, 4, 5, 2
D. 4, 2, 5, 6, 3, 1
E. 3, 2, 4, 6, 1, 5
During exercise, the _____ will be lower
A. the end-diastolic volume
B. the end-systolic volume
Has three cuplike leaflets and has the aorta on one side
A. tricuspid valve
B. bicuspid valve
C. aortic valve
D. pulmonary valve
An AV valve that has two flaps
A. the right AV valve
B. the left AV valve
C. aortic valve
D. pulmonary valve
Which of the following is correct about the filling of the ventricles?
A. The majority of ventricular filling is caused by contraction of the atria.
an AV valve that has three flaps
, A. the right AV valve
B. the left AV valve
C. aortic valve
D. pulmonary valve
the amount of blood left in the ventricle after it contracts
A. cardiac output (CO)
B. heart rate (HR)
C. end-diastolic volume (EDV)
D. stroke volume (SV)
E. end-systolic volume (ESV)
The chambers of the heart that pump blood into the arteries are the
A. cusps.
B. atria.
C. ventricles.
D. chordae tendineae.
an AV valve that has three flaps
A. tricuspid valve
B. bicuspid valve
C. aortic valve
D. pulmonary valve
What causes the aortic semilunar valve to close?
A. equal ventricular and aortic pressures
B. higher ventricular pressure than aortic pressure
C. greater pressure in the aorta than in the left ventricle
Which of the following events results in the first heart sound?
A. The atria contract.
B. The AV valves open.
C. The AV valves close.
D. The semilunar valves open.
E. The semilunar valves close.
During exercise, the _____ will be higher
A. the end-diastolic volume
B. the end-systolic volume
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