PHYS 261 HUMAN PHYSIOLOGY MIDTERM
EXAM FINAL TEST PAPER 2026 FULL
QUESTIONS AND SOLUTIONS VERIFIED A+
◉ This protein is activated by the Ca2+-calmodulin complex to
phosphorylate the myosin light chain protein.
a. myosin heavy chain
b. myosin light chain phosphatase
c. tropomyosin
d. myosin light chain kinase. Answer: d. myosin light chain kinase
◉ In which situation would end-systolic volume (ESV) be the
greatest?
a. when parasympathetic stimulation of the heart is increased
b. when the intracellular stores of calcium are increased
c. when the force of myocardial contraction is increased
d. when stroke volume is increased
e. when sympathetic stimulation of the heart is increased. Answer: a.
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
a. myofilament.
b. sarcomere.
c. crossbridge.
d. myomere.
e. sarcofibril.. Answer: b. sarcomere.
◉ The contraction cycle is initiated by the rise in ________ released
from the sarcoplasmic reticulum (SR).
a. Ca2+
b. Na+
c. K+. Answer: a. Ca2+
◉ The cardiac output is equal to the
a. stroke volume less the end-systolic volume.
b. difference between the stroke volume at rest and the stroke
volume during exercise.
, c. difference between the end-diastolic volume and the end-systolic
volume.
d. product of heart rate and stroke volume.
e. product of heart rate and blood pressure.. Answer: d. product of
heart rate and stroke volume.
◉ The importance of the plateau phase of the action potential of
myocardial cells is in
a. regulating Ca2+ availability to the cells.
b. preventing overstretching of the cells.
c. enhancing the efficiency of oxygen use by the cells.
d. preventing fibrillation.
e. preventing tetanus.. Answer: e. preventing tetanus.
◉ If cardiac output increases and resistance in arterioles does NOT
change, what happens to arterial blood pressure?
a. decreases
b. increases
c. is unchanged. Answer: b. increases
◉ Match the structure to its description.
EXAM FINAL TEST PAPER 2026 FULL
QUESTIONS AND SOLUTIONS VERIFIED A+
◉ This protein is activated by the Ca2+-calmodulin complex to
phosphorylate the myosin light chain protein.
a. myosin heavy chain
b. myosin light chain phosphatase
c. tropomyosin
d. myosin light chain kinase. Answer: d. myosin light chain kinase
◉ In which situation would end-systolic volume (ESV) be the
greatest?
a. when parasympathetic stimulation of the heart is increased
b. when the intracellular stores of calcium are increased
c. when the force of myocardial contraction is increased
d. when stroke volume is increased
e. when sympathetic stimulation of the heart is increased. Answer: a.
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
a. myofilament.
b. sarcomere.
c. crossbridge.
d. myomere.
e. sarcofibril.. Answer: b. sarcomere.
◉ The contraction cycle is initiated by the rise in ________ released
from the sarcoplasmic reticulum (SR).
a. Ca2+
b. Na+
c. K+. Answer: a. Ca2+
◉ The cardiac output is equal to the
a. stroke volume less the end-systolic volume.
b. difference between the stroke volume at rest and the stroke
volume during exercise.
, c. difference between the end-diastolic volume and the end-systolic
volume.
d. product of heart rate and stroke volume.
e. product of heart rate and blood pressure.. Answer: d. product of
heart rate and stroke volume.
◉ The importance of the plateau phase of the action potential of
myocardial cells is in
a. regulating Ca2+ availability to the cells.
b. preventing overstretching of the cells.
c. enhancing the efficiency of oxygen use by the cells.
d. preventing fibrillation.
e. preventing tetanus.. Answer: e. preventing tetanus.
◉ If cardiac output increases and resistance in arterioles does NOT
change, what happens to arterial blood pressure?
a. decreases
b. increases
c. is unchanged. Answer: b. increases
◉ Match the structure to its description.
