PNB 2265 Exam 2 Sample Questions and
Answers with Verified Solutions | Latest
Updated 2026
What causes electrical The cardiac skeleton
contraction between the
ventricles and the atria?
What happens during the fight The LTCC (L type calcium channel) is
or flight response? phosphorylated
Stroke volume decreases Neither the cardioinhibitory center is
when: activated and epinephrine is released
from the cardiac nerve
During what phase of the Early diastole
cardiac cycle, the pressure
inside of the left ventricle
decreases until it becomes
equal to the pressure inside of
the left atrium?
The inferior vena cava has a larger, lower
_____ radius than na arteriole
and is under _______ pressure.
, Due to the law of laplace: neither:
aneurysms are more likely to develop in
smaller vessels
tension is inversely proportional to vessel
radius
In order to decrease the Increase, less than two
resistance in a blood vessel by
a factor of two, radius must ____
by a factor of ______.
Marsha eats at a sushi Her heart stops beating
restaurant she found on
Groupon, and unknowingly
ingests tetradotoxin (a poison
that inhibits voltage gated
sodium channels). As a result:
A patient with a non-functional False
AV node would not produce
ventricular contractions: T/F
Which of the following SA Node- Internodal Pathways- Atrial
correctly sequences the path Myocytes - Bundle of His - Ventricular
of excitation through the Myocytes
heart?
Digitalis is a drug that inhibits Both:
the Na/K/ATPase. The impact ST segment elevation
of this drug on the heart would Reduced calcium efflux
be:
Answers with Verified Solutions | Latest
Updated 2026
What causes electrical The cardiac skeleton
contraction between the
ventricles and the atria?
What happens during the fight The LTCC (L type calcium channel) is
or flight response? phosphorylated
Stroke volume decreases Neither the cardioinhibitory center is
when: activated and epinephrine is released
from the cardiac nerve
During what phase of the Early diastole
cardiac cycle, the pressure
inside of the left ventricle
decreases until it becomes
equal to the pressure inside of
the left atrium?
The inferior vena cava has a larger, lower
_____ radius than na arteriole
and is under _______ pressure.
, Due to the law of laplace: neither:
aneurysms are more likely to develop in
smaller vessels
tension is inversely proportional to vessel
radius
In order to decrease the Increase, less than two
resistance in a blood vessel by
a factor of two, radius must ____
by a factor of ______.
Marsha eats at a sushi Her heart stops beating
restaurant she found on
Groupon, and unknowingly
ingests tetradotoxin (a poison
that inhibits voltage gated
sodium channels). As a result:
A patient with a non-functional False
AV node would not produce
ventricular contractions: T/F
Which of the following SA Node- Internodal Pathways- Atrial
correctly sequences the path Myocytes - Bundle of His - Ventricular
of excitation through the Myocytes
heart?
Digitalis is a drug that inhibits Both:
the Na/K/ATPase. The impact ST segment elevation
of this drug on the heart would Reduced calcium efflux
be:
