Navigation » List of Schools » California State University, Fullerton » Biology » Biol 362 – Mammalian Physiology » Fall 2021 » Quiz 4
Below are the questions for the exam with the choices of answers:
Question #1
A are used to diagnose heart murmurs
B measure the mechanical activity of the heart
C provide direct information about heart function
D show the summed electrical activity generated by all cells of the heart
Question #2
A increasing, decreasing
B decreasing, increasing
C decreasing, decreasing
D increasing, increasing
Question #3
A the ventricles must be completely empty
B the atria must be in diastole but the atrial pressure must be lower than the veins
C the AV valves must be open
D the atria must be in diastole
Question #4
A sarcomeres
B Atrium
C myocardium
D Autorhythmic cells
Question #5
A the atria are contracting
B blood is entering the ventricles
C the AV valves are closed
D the pressure in the ventricles declines
Question #6
A increased contractile strength
B decreased force of contraction
C decreased rate of contraction
D increased sensitivity to acetylcholine
Question #7
A during the ST segment
B just after the T wave
C just after the Q wave
D during the first part of the P wave
Question #8
A SA node
B semilunar valves
C AV valves
D Atrium
Question #9
A the greatest increase in ventricular pressure occurs during the filling phase
B the QRS complex of the ECG comes before the increase in ventricular pressure
C the P wave of the ECG occurs between the first and third heart sounds
D the second heart sound is recorded as the QRS complex of the ECG
Question #10
A FALSE
B TRUE
Question #11
A directs the flow of blood into the arteries
B transmits electrical activity from the atria to the ventricles
C forces electrical activity to be conducted through the atrioventricular node
D helps guide the blood into the proper chambers in sequence
Question #12
A cardiac output (CO)
B end-systolic volume (ESV)
C end-diastolic volume (EDV)
D stroke volume (SV)
Question #13
A acetylcholine does not act on the heart
B increasing the permeability to Ca2+
C increasing ion influx, thus increasing the rate of depolarization
D increasing the permeability to K+ and decreasing the permeability to Ca2+
Question #14
A a net influx of sodium
B prolonged calcium influx
C sodium and potassium channels are always open
D unstable membrane potentials
Question #15
A cardiac output (CO)
B heart rate (HR)
C end-diastolic volume (EDV)
D end-systolic volume (ESV)
Question #16
A product of heart rate and stroke volume
B difference between the end0diastolic volume and end-systolic volume
C blood stored within the veins
D stroke volume minus the end-systolic volume
Question #17
A the SA node fires
B blood is ejected from the atrium
C ventricular systole occurs
D the P wave develops
Question #18
A only potassium
B only calcium
C only sodium
D both calcium and potassium
Question #19
A contribute to the force of contraction
B are also called pacemakers because they set the rate of the heartbeat
C have organized sarcomeres
D are the same size as myocardial contractile cells
Question #20
A potassium only
B sodium and potassium
C calcium only
D sodium only
Question #21
A repolarization of the atria
B the progressive wave of ventricular depolarization
C depolarization of the atria
D repolarization of the ventricles
Question #22
A allows more calcium to enter and increase the force of contraction
B only increases the force of contraction
C only allows more calcium to enter
D only decreases the force of a contraction
Question #23
A venous return
B myocardium thickness
C heart rate
D end-diastolic volume
Question #24
A the semilunar valves close
B the AV valves close
C the semilunar valves open
D the AV valves open
Question #25
A the semilunar valves are closed
B blood is forced into the veins
C the QRS is just starting
D the ventricles are in systole