BSNC 3000 Final Exam Questions &
Answers (Grade A+)
Does blood perfuse the coronary circulation during systole or
diastole? -
correct answer ✅Diastole
What happens to myocardial blood flow when heart rate increases?
-
correct answer ✅When heart rate increases, the cardiac cycle is
shortened in duration; less time is spent in diastole, which
decreases the time available for coronary perfusion.
70% of oxygen in coronary blood is extracted by the myocardium at
rest. This means that there is little oxygen reserve when myocardial
demand increases. What must happen when oxygen demands of
the heart increase to ensure adequate oxygen supply? -
correct answer ✅If oxygen demands of the heart increase,
coronary blood flow must increase (e.g. v/d d/t NO)
which portion of the heart is first affected by MI? -
correct answer ✅the first inner third (furthest away from the
coronary artery and subject to higher pressures from the inside of
the heart)
,BSNC 3000 Final Exam Questions &
Answers (Grade A+)
subendocardial infarct -
correct answer ✅sudden reperfusion of coronary artery following
an MI, where only the inner third of the ventricle wall is irreversibly
damaged (infarct)
N-STEMI
can also be caused by conditions that dec perfusion:
- severe atherosclerosis
- hypotension
sources of heat gain -
correct answer ✅external sources
- cell metabolism
- muscle activity
- ingestion of food
sources of heat loss -
correct answer ✅- evaporation of sweat
- through the skin
- breathing
,BSNC 3000 Final Exam Questions &
Answers (Grade A+)
What regulates body temperature? -
correct answer ✅hypothalamus - determines set point
why are older adults at risk for hypothermia? -
correct answer ✅less heat gain:
- smaller meals
- mobilize less (less muscle activity)
- less cellular metabolism
more heat loss:
- less fat -> more heat loss
why does stress inc body temp? -
correct answer ✅PSR -> inc metabolism
inc muscle tension
vasoconstricton -> less heat loss
fever definition -
correct answer ✅increase in core body temperature d/t resetting
of thermodynamic set point in response to pyrogens
, BSNC 3000 Final Exam Questions &
Answers (Grade A+)
is PSR the cause of fever? -
correct answer ✅alone, no.
if underlying cause of PSR causes the release of pyrogens
(infection), then yes
general causes of fever (2) -
correct answer ✅infection
inflammation
causes of hyperthermia -
correct answer ✅malignant hyperthermia
PSR
malignant hyperthermia -
correct answer ✅A hereditary condition of uncontrolled heat
production that occurs when susceptible people receive certain
anesthetic drugs.
Answers (Grade A+)
Does blood perfuse the coronary circulation during systole or
diastole? -
correct answer ✅Diastole
What happens to myocardial blood flow when heart rate increases?
-
correct answer ✅When heart rate increases, the cardiac cycle is
shortened in duration; less time is spent in diastole, which
decreases the time available for coronary perfusion.
70% of oxygen in coronary blood is extracted by the myocardium at
rest. This means that there is little oxygen reserve when myocardial
demand increases. What must happen when oxygen demands of
the heart increase to ensure adequate oxygen supply? -
correct answer ✅If oxygen demands of the heart increase,
coronary blood flow must increase (e.g. v/d d/t NO)
which portion of the heart is first affected by MI? -
correct answer ✅the first inner third (furthest away from the
coronary artery and subject to higher pressures from the inside of
the heart)
,BSNC 3000 Final Exam Questions &
Answers (Grade A+)
subendocardial infarct -
correct answer ✅sudden reperfusion of coronary artery following
an MI, where only the inner third of the ventricle wall is irreversibly
damaged (infarct)
N-STEMI
can also be caused by conditions that dec perfusion:
- severe atherosclerosis
- hypotension
sources of heat gain -
correct answer ✅external sources
- cell metabolism
- muscle activity
- ingestion of food
sources of heat loss -
correct answer ✅- evaporation of sweat
- through the skin
- breathing
,BSNC 3000 Final Exam Questions &
Answers (Grade A+)
What regulates body temperature? -
correct answer ✅hypothalamus - determines set point
why are older adults at risk for hypothermia? -
correct answer ✅less heat gain:
- smaller meals
- mobilize less (less muscle activity)
- less cellular metabolism
more heat loss:
- less fat -> more heat loss
why does stress inc body temp? -
correct answer ✅PSR -> inc metabolism
inc muscle tension
vasoconstricton -> less heat loss
fever definition -
correct answer ✅increase in core body temperature d/t resetting
of thermodynamic set point in response to pyrogens
, BSNC 3000 Final Exam Questions &
Answers (Grade A+)
is PSR the cause of fever? -
correct answer ✅alone, no.
if underlying cause of PSR causes the release of pyrogens
(infection), then yes
general causes of fever (2) -
correct answer ✅infection
inflammation
causes of hyperthermia -
correct answer ✅malignant hyperthermia
PSR
malignant hyperthermia -
correct answer ✅A hereditary condition of uncontrolled heat
production that occurs when susceptible people receive certain
anesthetic drugs.
