physio final exam WITH 100%
CORRECT ANSWERS
The volume of blood pumped out of the heart from one ventricle during one contraction -
Stroke Volume (SV)
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to
which ion(s)? - Na+ only
The volume of blood in the ventricle available to be pumped out of the heart during one
contraction - End- diastolic volume (EDV)
The volume of blood left in the ventricle after it contracts - End- systolic volume (ESV)
The volume of blood ejected from each ventricle during a contraction - Stroke volume
(SV)
What happens when calcium binds to troponin? - Tropomyosin is pulled away from the
myosin-binding site on actin.
The driving force for blood flow is a(n) ________ gradient. - pressure
Which would NOT cause an increase in blood pressure? - a decrease in cardiac output
Match the name of the wave with the correlated event:
, ventricular depolarization - QRS complex
The function of transverse tubules is to - rapidly conduct action potentials to the interior
of the muscle fiber.
Which is greater:
A) blood pressure when the peripheral vessels constrict
B) blood pressure when the peripheral vessels dilate - A) blood pressure when the
peripheral vessels constrict
The P wave of an ECG corresponds to - depolarization of the atria
The reflex that compliments a withdrawal reflex by making compensatory adjustments on the
opposite side of the body receiving the stimulus is the - crossed extensor reflex
Your instructor announces a pop quiz. Which would you expect? - Increased sympathetic
signaling and increased cardiac output
This protein is activated by the Ca2+-calmodulin complex to phosphorylate the myosin light
chain protein. - myosin light chain kinase
In which situation would end- systolic volume (ESV) be the greatest? - when
parasympathetic stimulation of the heart is increased
Striated muscles are so- called because of a repeating pattern of light and dark bands. One
repeating unit of the banding pattern is called a - Sarcomere
CORRECT ANSWERS
The volume of blood pumped out of the heart from one ventricle during one contraction -
Stroke Volume (SV)
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to
which ion(s)? - Na+ only
The volume of blood in the ventricle available to be pumped out of the heart during one
contraction - End- diastolic volume (EDV)
The volume of blood left in the ventricle after it contracts - End- systolic volume (ESV)
The volume of blood ejected from each ventricle during a contraction - Stroke volume
(SV)
What happens when calcium binds to troponin? - Tropomyosin is pulled away from the
myosin-binding site on actin.
The driving force for blood flow is a(n) ________ gradient. - pressure
Which would NOT cause an increase in blood pressure? - a decrease in cardiac output
Match the name of the wave with the correlated event:
, ventricular depolarization - QRS complex
The function of transverse tubules is to - rapidly conduct action potentials to the interior
of the muscle fiber.
Which is greater:
A) blood pressure when the peripheral vessels constrict
B) blood pressure when the peripheral vessels dilate - A) blood pressure when the
peripheral vessels constrict
The P wave of an ECG corresponds to - depolarization of the atria
The reflex that compliments a withdrawal reflex by making compensatory adjustments on the
opposite side of the body receiving the stimulus is the - crossed extensor reflex
Your instructor announces a pop quiz. Which would you expect? - Increased sympathetic
signaling and increased cardiac output
This protein is activated by the Ca2+-calmodulin complex to phosphorylate the myosin light
chain protein. - myosin light chain kinase
In which situation would end- systolic volume (ESV) be the greatest? - when
parasympathetic stimulation of the heart is increased
Striated muscles are so- called because of a repeating pattern of light and dark bands. One
repeating unit of the banding pattern is called a - Sarcomere
