EKG Midterm Exam – 2025 Updated Actual
Questions and Correct Answers Graded A+
The cardiac skeleton that covers the AV valves:
Electrically insulate the ventricles from the atria
The _____________ side of the heart pumps blood into the _____________
circulation, and the _____________ side of the heart pumps blood into the
_____________ circulation.
Right; pulmonary; left, systemic
T or F: The right ventricle is larger than the left.
False
Which ions are most important in determining the cardiac transmembrane
electrical potential?
Sodium, calcium, potassium
, Firing of ______ neurons cause in an increased frequency of SA node action
potentials
Sympathetic
_____ are channels that allow ions to flow from the cytoplasm of one cell directly
to its neighboring cell.
Gap junctions
Which of the following has an intrinsic rate of 15-40 bpm?
Purkinje fibers
The __ is located in the wall of the right atrium and is responsible for slowing
down conduction form the atrial to the ventricles in a process known as
decremental conduction.
AV node
The SA node is located
Questions and Correct Answers Graded A+
The cardiac skeleton that covers the AV valves:
Electrically insulate the ventricles from the atria
The _____________ side of the heart pumps blood into the _____________
circulation, and the _____________ side of the heart pumps blood into the
_____________ circulation.
Right; pulmonary; left, systemic
T or F: The right ventricle is larger than the left.
False
Which ions are most important in determining the cardiac transmembrane
electrical potential?
Sodium, calcium, potassium
, Firing of ______ neurons cause in an increased frequency of SA node action
potentials
Sympathetic
_____ are channels that allow ions to flow from the cytoplasm of one cell directly
to its neighboring cell.
Gap junctions
Which of the following has an intrinsic rate of 15-40 bpm?
Purkinje fibers
The __ is located in the wall of the right atrium and is responsible for slowing
down conduction form the atrial to the ventricles in a process known as
decremental conduction.
AV node
The SA node is located
