Pathophysiology Exam Mcqs Questions and
Answers
How does dehydration effect the hematocrit?
a. plasma volume decreases, hematocrit increases
b. plasma volume increases, hematocrit decreases
c. hematocrit does not change
d. plasma volume does not change - (Answer)a. plasma volume decreases, hematocrit increases
A parasympathetic response on the heart causes:
a. increased heart rate only
b. decreased heart rate only
c. increased heart rate and force of contraction
d. decreased heart rate and force of contraction - (Answer)b. decreased heart rate only
Why is some of the blood kept in the heart after ejection?
a. maintain optimal sarcomere length to allow a good contraction
b. to allow a greater stroke volume
c. the left ventricle is hypertrophied and cannot eject all of the blood out
d. there is a dysfunction in the function of the SA node - (Answer)a. maintain optimal sarcomere
length to allow a good contraction
During isovolumic ventricular contraction, what happens to the valves?
a. they all close
b. they all open
c. AV valves open, semilunar valves close
d. AV valves close, semilunar valves open - (Answer)a. they all close
removal of old RBC's and conversion of heme into bilirubin occurs:
a. in the heart
, b. in the spleen
c. in the kidneys
d. in the liver - (Answer)b. in the spleen
Before RBC's mature, they are called:
a. erythrocytes
b. thrombocytes
c. reticulocytes
d. leukocytes - (Answer)c. reticulocytes
Where do reticulocytes enter into the bloodstream to later mature into RBC's?
a. coronary arteries
b. carotid arteries
c. venous sinusoids
d. venous capillaries - (Answer)c. venous sinusoids
Water balance, eating behaviors and temperature regulation are regulated by:
a. hypothalamus
b. pons
c. medulla
d. cerebral cortex - (Answer)a. hypothalamus
blood pressure is sensed by baroreceptors and sent to which part of the brain for interpretation?
a. hypothalamus
b. pons
c. medulla
d. cerebral cortex - (Answer)c. medulla
What allows efficiency in eliciting a response in the postganglionic neurons of the autonomic
nervous system?
Answers
How does dehydration effect the hematocrit?
a. plasma volume decreases, hematocrit increases
b. plasma volume increases, hematocrit decreases
c. hematocrit does not change
d. plasma volume does not change - (Answer)a. plasma volume decreases, hematocrit increases
A parasympathetic response on the heart causes:
a. increased heart rate only
b. decreased heart rate only
c. increased heart rate and force of contraction
d. decreased heart rate and force of contraction - (Answer)b. decreased heart rate only
Why is some of the blood kept in the heart after ejection?
a. maintain optimal sarcomere length to allow a good contraction
b. to allow a greater stroke volume
c. the left ventricle is hypertrophied and cannot eject all of the blood out
d. there is a dysfunction in the function of the SA node - (Answer)a. maintain optimal sarcomere
length to allow a good contraction
During isovolumic ventricular contraction, what happens to the valves?
a. they all close
b. they all open
c. AV valves open, semilunar valves close
d. AV valves close, semilunar valves open - (Answer)a. they all close
removal of old RBC's and conversion of heme into bilirubin occurs:
a. in the heart
, b. in the spleen
c. in the kidneys
d. in the liver - (Answer)b. in the spleen
Before RBC's mature, they are called:
a. erythrocytes
b. thrombocytes
c. reticulocytes
d. leukocytes - (Answer)c. reticulocytes
Where do reticulocytes enter into the bloodstream to later mature into RBC's?
a. coronary arteries
b. carotid arteries
c. venous sinusoids
d. venous capillaries - (Answer)c. venous sinusoids
Water balance, eating behaviors and temperature regulation are regulated by:
a. hypothalamus
b. pons
c. medulla
d. cerebral cortex - (Answer)a. hypothalamus
blood pressure is sensed by baroreceptors and sent to which part of the brain for interpretation?
a. hypothalamus
b. pons
c. medulla
d. cerebral cortex - (Answer)c. medulla
What allows efficiency in eliciting a response in the postganglionic neurons of the autonomic
nervous system?
