NR 324 MED SURG EXAM 2
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
____ elevation is a sensitive indicator of very early
myocardial injury, but lacks specificity for MI. Its usefulness
in diagnosing MI is limited - correct answer-
myoglobin - a low molecular weight heme protein found in
cardiac and skeletal muscle
____ is an amino acid produced during protein catabolism.
Elevated levels can be either hereditary or acquired from
dietary deficiencies of vitamin B6, vitamin B12, or folate.
Elevated levels have been linked to a higher risk of CAD,
peripheral vascular disease, and stroke. - correct answer-
homocysteine (Hcy)
____ prevent blood from regurgitating into the ventricles at
the end of each ventricular contraction - correct answer-
The pulmonic and aortic valves (also known as semilunar
valves)
a marker of choice for distinguishing a cardiac or
respiratory cause of dyspnea - correct answer- BNP
is a marker of choice for distinguishing a cardiac or
respiratory cause of dyspnea.
, A P wave on an ECG represents an impulse arising at the
a. SA node and repolarizing the atria.
b. SA node and depolarizing the atria.
c. AV node and depolarizing the atria.
d. AV node and spreading to the bundle of His. - correct
answer- b. SA node and depolarizing the atria.
Rationale: The first wave, P, begins with the firing of the
sinoatrial (SA) node and represents depolarization of the
fibers of the atria.
A patient has a severe blockage in his right coronary artery.
Which cardiac structures are most likely to be affected by
this blockage? (SELECT ALL THAT APPLY)
a. AV node
b. left ventricle
c. coronary sinus
d. right ventricle
e. pulmonic valve - correct answer- a. AV node
b. left ventricle
d. right ventricle
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
____ elevation is a sensitive indicator of very early
myocardial injury, but lacks specificity for MI. Its usefulness
in diagnosing MI is limited - correct answer-
myoglobin - a low molecular weight heme protein found in
cardiac and skeletal muscle
____ is an amino acid produced during protein catabolism.
Elevated levels can be either hereditary or acquired from
dietary deficiencies of vitamin B6, vitamin B12, or folate.
Elevated levels have been linked to a higher risk of CAD,
peripheral vascular disease, and stroke. - correct answer-
homocysteine (Hcy)
____ prevent blood from regurgitating into the ventricles at
the end of each ventricular contraction - correct answer-
The pulmonic and aortic valves (also known as semilunar
valves)
a marker of choice for distinguishing a cardiac or
respiratory cause of dyspnea - correct answer- BNP
is a marker of choice for distinguishing a cardiac or
respiratory cause of dyspnea.
, A P wave on an ECG represents an impulse arising at the
a. SA node and repolarizing the atria.
b. SA node and depolarizing the atria.
c. AV node and depolarizing the atria.
d. AV node and spreading to the bundle of His. - correct
answer- b. SA node and depolarizing the atria.
Rationale: The first wave, P, begins with the firing of the
sinoatrial (SA) node and represents depolarization of the
fibers of the atria.
A patient has a severe blockage in his right coronary artery.
Which cardiac structures are most likely to be affected by
this blockage? (SELECT ALL THAT APPLY)
a. AV node
b. left ventricle
c. coronary sinus
d. right ventricle
e. pulmonic valve - correct answer- a. AV node
b. left ventricle
d. right ventricle
