PNB 2265 EXAM 2 EXAMPLE QUESTIONS
WITH ACTUAL SOLUTIONS .
What causes electrical contraction between the ventricles and the atria? -
Correct Answer -The cardiac skeleton
What happens during the fight or flight response? - Correct Answer -The LTCC
(L type calcium channel) is phosphorylated
Stroke volume decreases when: - Correct Answer -Neither the cardioinhibitory
center is activated and epinephrine is released from the cardiac nerve
During what phase of the cardiac cycle, the pressure inside of the left ventricle
decreases until it becomes equal to the pressure inside of the left atrium? -
Correct Answer -Early diastole
The inferior vena cava has a _____ radius than na arteriole and is under
_______ pressure. - Correct Answer -larger, lower
Due to the law of laplace: - Correct Answer -neither:
aneurysms are more likely to develop in smaller vessels
tension is inversely proportional to vessel radius
In order to decrease the resistance in a blood vessel by a factor of two, radius
must ____ by a factor of ______. - Correct Answer -Increase, less than two
1
, Marsha eats at a sushi restaurant she found on Groupon, and unknowingly
ingests tetradotoxin (a poison that inhibits voltage gated sodium channels). As a
result: - Correct Answer -Her heart stops beating
A patient with a non-functional AV node would not produce ventricular
contractions: T/F - Correct Answer -False
Which of the following correctly sequences the path of excitation through the
heart? - Correct Answer -SA Node- Internodal Pathways- Atrial Myocytes -
Bundle of His - Ventricular Myocytes
Digitalis is a drug that inhibits the Na/K/ATPase. The impact of this drug on the
heart would be: - Correct Answer -Both:
ST segment elevation
Reduced calcium efflux
What effect would a beta adrenergic receptor have on action potential in a
muscular stimulus? - Correct Answer -Increase the activation of HCN
damage to the interventricular septum would be most visible where on an ECG?
- Correct Answer -In between the P wave and the QRS complex
According the the Frank Starling Law, increasing end diastolic volume (EDV)
would: - Correct Answer -both increase stroke volume, and increase cardiac
output
During this phase of the cardiac cycle, the left ventricle passively fills - Correct
Answer -late diastole
which of the following are located on the plasma membrane - Correct Answer -
L-Type Calcium channels
2
WITH ACTUAL SOLUTIONS .
What causes electrical contraction between the ventricles and the atria? -
Correct Answer -The cardiac skeleton
What happens during the fight or flight response? - Correct Answer -The LTCC
(L type calcium channel) is phosphorylated
Stroke volume decreases when: - Correct Answer -Neither the cardioinhibitory
center is activated and epinephrine is released from the cardiac nerve
During what phase of the cardiac cycle, the pressure inside of the left ventricle
decreases until it becomes equal to the pressure inside of the left atrium? -
Correct Answer -Early diastole
The inferior vena cava has a _____ radius than na arteriole and is under
_______ pressure. - Correct Answer -larger, lower
Due to the law of laplace: - Correct Answer -neither:
aneurysms are more likely to develop in smaller vessels
tension is inversely proportional to vessel radius
In order to decrease the resistance in a blood vessel by a factor of two, radius
must ____ by a factor of ______. - Correct Answer -Increase, less than two
1
, Marsha eats at a sushi restaurant she found on Groupon, and unknowingly
ingests tetradotoxin (a poison that inhibits voltage gated sodium channels). As a
result: - Correct Answer -Her heart stops beating
A patient with a non-functional AV node would not produce ventricular
contractions: T/F - Correct Answer -False
Which of the following correctly sequences the path of excitation through the
heart? - Correct Answer -SA Node- Internodal Pathways- Atrial Myocytes -
Bundle of His - Ventricular Myocytes
Digitalis is a drug that inhibits the Na/K/ATPase. The impact of this drug on the
heart would be: - Correct Answer -Both:
ST segment elevation
Reduced calcium efflux
What effect would a beta adrenergic receptor have on action potential in a
muscular stimulus? - Correct Answer -Increase the activation of HCN
damage to the interventricular septum would be most visible where on an ECG?
- Correct Answer -In between the P wave and the QRS complex
According the the Frank Starling Law, increasing end diastolic volume (EDV)
would: - Correct Answer -both increase stroke volume, and increase cardiac
output
During this phase of the cardiac cycle, the left ventricle passively fills - Correct
Answer -late diastole
which of the following are located on the plasma membrane - Correct Answer -
L-Type Calcium channels
2
