WCU PHYS 261 FINAL EXAM 2023-2024 ACTUAL EXAM 2 LATEST VERSIONS A AND B EACH VERSION
CONTAINS 100 QUESTIONS AND CORRECT DETAILED ANSWERS
The volume of blood pumped out of the heart from one ventricle during one contraction - (answer)
Stroke Volume (SV)
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which
ion(s)? - (answer) Na+ only
The volume of blood in the ventricle available to be pumped out of the heart during one contraction -
(answer) End- diastolic volume (EDV)
The volume of blood left in the ventricle after it contracts - (answer) End- systolic volume (ESV)
The volume of blood ejected from each ventricle during a contraction - (answer) Stroke volume (SV)
What happens when calcium binds to troponin? - (answer) Tropomyosin is pulled away from the
myosin-binding site on actin.
The driving force for blood flow is a(n) ________ gradient. - (answer) pressure
Which would NOT cause an increase in blood pressure? - (answer) a decrease in cardiac output
Match the name of the wave with the correlated event:
ventricular depolarization - (answer) QRS complex
The function of transverse tubules is to - (answer) rapidly conduct action potentials to the interior of
the muscle fiber.
Which is greater:
A) blood pressure when the peripheral vessels constrict
, WCU PHYS 261 FINAL EXAM 2023-2024 ACTUAL EXAM 2 LATEST VERSIONS A AND B EACH VERSION
CONTAINS 100 QUESTIONS AND CORRECT DETAILED ANSWERS
B) blood pressure when the peripheral vessels dilate - (answer) A) blood pressure when the peripheral
vessels constrict
The P wave of an ECG corresponds to - (answer) 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 - (answer) crossed extensor reflex
Your instructor announces a pop quiz. Which would you expect? - (answer) Increased sympathetic
signaling and increased cardiac output
This protein is activated by the Ca2+-calmodulin complex to phosphorylate the myosin light chain
protein. - (answer) myosin light chain kinase
In which situation would end- systolic volume (ESV) be the greatest? - (answer) 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 - (answer) Sarcomere
The contraction cycle is initiated by the rise in _______ released from the sarcoplasmic reticulum (SR). -
(answer) Ca2+
The cardiac output is equal to the - (answer) product of heart rate and stroke volume
The importance of the plateau phase of the action potential of myocardial cells is in - (answer)
preventing tetanus
If cardiac output increases and resistance in arterioles does NOT change, what happens to arterial blood
pressure? - (answer) increases
CONTAINS 100 QUESTIONS AND CORRECT DETAILED ANSWERS
The volume of blood pumped out of the heart from one ventricle during one contraction - (answer)
Stroke Volume (SV)
The rapid depolarization phase of the action potentials of myocardial contractile cells is due to which
ion(s)? - (answer) Na+ only
The volume of blood in the ventricle available to be pumped out of the heart during one contraction -
(answer) End- diastolic volume (EDV)
The volume of blood left in the ventricle after it contracts - (answer) End- systolic volume (ESV)
The volume of blood ejected from each ventricle during a contraction - (answer) Stroke volume (SV)
What happens when calcium binds to troponin? - (answer) Tropomyosin is pulled away from the
myosin-binding site on actin.
The driving force for blood flow is a(n) ________ gradient. - (answer) pressure
Which would NOT cause an increase in blood pressure? - (answer) a decrease in cardiac output
Match the name of the wave with the correlated event:
ventricular depolarization - (answer) QRS complex
The function of transverse tubules is to - (answer) rapidly conduct action potentials to the interior of
the muscle fiber.
Which is greater:
A) blood pressure when the peripheral vessels constrict
, WCU PHYS 261 FINAL EXAM 2023-2024 ACTUAL EXAM 2 LATEST VERSIONS A AND B EACH VERSION
CONTAINS 100 QUESTIONS AND CORRECT DETAILED ANSWERS
B) blood pressure when the peripheral vessels dilate - (answer) A) blood pressure when the peripheral
vessels constrict
The P wave of an ECG corresponds to - (answer) 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 - (answer) crossed extensor reflex
Your instructor announces a pop quiz. Which would you expect? - (answer) Increased sympathetic
signaling and increased cardiac output
This protein is activated by the Ca2+-calmodulin complex to phosphorylate the myosin light chain
protein. - (answer) myosin light chain kinase
In which situation would end- systolic volume (ESV) be the greatest? - (answer) 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 - (answer) Sarcomere
The contraction cycle is initiated by the rise in _______ released from the sarcoplasmic reticulum (SR). -
(answer) Ca2+
The cardiac output is equal to the - (answer) product of heart rate and stroke volume
The importance of the plateau phase of the action potential of myocardial cells is in - (answer)
preventing tetanus
If cardiac output increases and resistance in arterioles does NOT change, what happens to arterial blood
pressure? - (answer) increases
