BIO 392 Exam 3 | 217 Verified Questions And Answers | Complete Quizzes Graded A+

BIO 392 Exam 3 | 217 Verified Questions And Answers
| Complete Quizzes Graded A+
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.
A. ventricular systole only.




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.
B. the AV valves are closed.




Which blood vessels return blood to the heart?
A. capillaries
B. atria

C. veins
D. arteries
C. veins




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.
A. the atria must not only be at rest but the atrial pressure must be lower than the veins.




The chambers of the heart that pump blood into the arteries are the
A. cusps.
B. atria.
C. ventricles.

D. chordae tendineae
C. ventricles.




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
A. Because the heart establishes a pressure gradient




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).
A. end-diastolic volume (EDV).

,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.

B. the QRS complex of the ECG precedes the increase in ventricular pressure.




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.

A. The P wave develops.




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.
D. stroke 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

, B. Both ventricular diastole and ventricular systole




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.
B. the atrioventricular valves and semilunar valves are closed.




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)
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
A. 3, 1, 4, 6, 2, 5


During exercise, the _____ will be lower