PHYS 261 final exam with precise detailed answers || || || || || || ||
Match each term with its definition.
|| || || || ||
A. cardiac output (CO)
|| || ||
B. heart rate (HR)
|| || ||
C. end-diastolic volume (EDV)
|| || ||
D. stroke volume (SV)
|| || ||
E. end-systolic volume
|| || ||
(ESV)the volume of blood pumped out of the heart from one ventricle during one
|| || || || || || || || || || || || || ||
contraction - ✔✔D. stroke volume (SV) || || || || ||
The rapid depolarization phase of the action potentials of myocardial contractile cells is due
|| || || || || || || || || || || || || ||
to which ion(s)?
|| ||
Ca2+ only ||
K+ only ||
Na+ only ||
both Ca2+ and K+ || || ||
both Na+ and K+ - ✔✔Na+ only
|| || || || || ||
Match each term with its definition.
|| || || || ||
A. cardiac output (CO)
|| || ||
B. heart rate (HR)
|| || ||
,C. end-diastolic volume (EDV)
|| || ||
D. stroke volume (SV)
|| || ||
E. end-systolic volume (ESV)
|| || ||
the volume of blood in the ventricle available to be pumped out of the heart during one
|| || || || || || || || || || || || || || || || ||
contraction - ✔✔c. end-diastolic volume (EDV) || || || || ||
Match each term with its definition.
|| || || || ||
A. cardiac output (CO)
|| || ||
B. heart rate (HR)
|| || ||
C. end-diastolic volume (EDV)
|| || ||
D. stroke volume (SV)
|| || ||
E. end-systolic volume (ESV)
|| || ||
the volume of blood left in the ventricle after it contracts - ✔✔E. end-systolic volume (ESV)
|| || || || || || || || || || || || || || ||
The volume of blood ejected from each ventricle during a contraction is called the
|| || || || || || || || || || || || ||
end-diastolic volume. ||
stroke volume. ||
cardiac reserve. ||
cardiac output. ||
end-systolic volume. - ✔✔stroke volume. || || || ||
What happens when calcium binds troponin?
|| || || || ||
, Troponin binds to actin and causes sarcomere shortening.
|| || || || || || ||
Troponin changes shape and covers the SR calcium channel, which is a form of negative
|| || || || || || || || || || || || || || ||
feedback.
Tropomyosin is pulled away from the myosin-binding site on actin.
|| || || || || || || || ||
Troponin releases myosin and activates actin. - ✔✔Tropomyosin is pulled away from the
|| || || || || || || || || || || || ||
myosin-binding site on actin. || || ||
The driving force for blood flow is a(n) ________ gradient.
|| || || || || || || || ||
gravity
pressure
osmotic
volume - ✔✔pressure || ||
Which would NOT cause an increase in blood pressure?
|| || || || || || || ||
an increase in arterial resistance
|| || || ||
a decrease in cardiac output
|| || || ||
a decrease in arterial diameter
|| || || ||
an increase in sympathetic activity - ✔✔a decrease in cardiac output
|| || || || || || || || || ||
Match the name of the wave with the correlated event.
|| || || || || || || || ||
A. P wave
|| ||
B. QRS complex
|| ||
Match each term with its definition.
|| || || || ||
A. cardiac output (CO)
|| || ||
B. heart rate (HR)
|| || ||
C. end-diastolic volume (EDV)
|| || ||
D. stroke volume (SV)
|| || ||
E. end-systolic volume
|| || ||
(ESV)the volume of blood pumped out of the heart from one ventricle during one
|| || || || || || || || || || || || || ||
contraction - ✔✔D. stroke volume (SV) || || || || ||
The rapid depolarization phase of the action potentials of myocardial contractile cells is due
|| || || || || || || || || || || || || ||
to which ion(s)?
|| ||
Ca2+ only ||
K+ only ||
Na+ only ||
both Ca2+ and K+ || || ||
both Na+ and K+ - ✔✔Na+ only
|| || || || || ||
Match each term with its definition.
|| || || || ||
A. cardiac output (CO)
|| || ||
B. heart rate (HR)
|| || ||
,C. end-diastolic volume (EDV)
|| || ||
D. stroke volume (SV)
|| || ||
E. end-systolic volume (ESV)
|| || ||
the volume of blood in the ventricle available to be pumped out of the heart during one
|| || || || || || || || || || || || || || || || ||
contraction - ✔✔c. end-diastolic volume (EDV) || || || || ||
Match each term with its definition.
|| || || || ||
A. cardiac output (CO)
|| || ||
B. heart rate (HR)
|| || ||
C. end-diastolic volume (EDV)
|| || ||
D. stroke volume (SV)
|| || ||
E. end-systolic volume (ESV)
|| || ||
the volume of blood left in the ventricle after it contracts - ✔✔E. end-systolic volume (ESV)
|| || || || || || || || || || || || || || ||
The volume of blood ejected from each ventricle during a contraction is called the
|| || || || || || || || || || || || ||
end-diastolic volume. ||
stroke volume. ||
cardiac reserve. ||
cardiac output. ||
end-systolic volume. - ✔✔stroke volume. || || || ||
What happens when calcium binds troponin?
|| || || || ||
, Troponin binds to actin and causes sarcomere shortening.
|| || || || || || ||
Troponin changes shape and covers the SR calcium channel, which is a form of negative
|| || || || || || || || || || || || || || ||
feedback.
Tropomyosin is pulled away from the myosin-binding site on actin.
|| || || || || || || || ||
Troponin releases myosin and activates actin. - ✔✔Tropomyosin is pulled away from the
|| || || || || || || || || || || || ||
myosin-binding site on actin. || || ||
The driving force for blood flow is a(n) ________ gradient.
|| || || || || || || || ||
gravity
pressure
osmotic
volume - ✔✔pressure || ||
Which would NOT cause an increase in blood pressure?
|| || || || || || || ||
an increase in arterial resistance
|| || || ||
a decrease in cardiac output
|| || || ||
a decrease in arterial diameter
|| || || ||
an increase in sympathetic activity - ✔✔a decrease in cardiac output
|| || || || || || || || || ||
Match the name of the wave with the correlated event.
|| || || || || || || || ||
A. P wave
|| ||
B. QRS complex
|| ||
