Physiology Practice Examination
60 Multiple Choice Questions
(DPT/Exam Diffficulty)
Cardiac Electrophysiology
1.
Which property allows the heart to generate its own electrical impulses?
A. Conductivity
B. Automaticity
C. Excitability
D. Contractility
2.
The normal pacemaker of the heart is the:
A. AV node
B. Bundle branches
C. Purkinje fibers
D. SA node
3.
Cardiac muscle differs from skeletal muscle because cardiac muscle:
A. Requires motor neuron stimulation
B. Cannot contract without the brain
C. Has spontaneous depolarization
D. Has no refractory period
4.
The unstable resting membrane potential of pacemaker cells is responsible for:
A. Plateau phase
B. Automaticity
C. Tetany
D. Hyperpolarization
, 5.
Automaticity is also known as:
A. Excitability
B. Conductivity
C. Self-excitation
D. Inhibition
6.
The autonomic nervous system primarily:
A. Initiates each heartbeat
B. Changes heart rate
C. Produces action potentials
D. Opens sodium channels
1.
Gap junctions are found within:
A. Sarcoplasmic reticulum
B. T tubules
C. Intercalated discs
D. Z discs
8.
Gap junctions allow:
A. Blood flow
B. Rapid electrical communication
C. Valve closure
D. Calcium storage
9.
The heart behaves electrically as:
A. Independent muscle fibers
B. Functional syncytium
60 Multiple Choice Questions
(DPT/Exam Diffficulty)
Cardiac Electrophysiology
1.
Which property allows the heart to generate its own electrical impulses?
A. Conductivity
B. Automaticity
C. Excitability
D. Contractility
2.
The normal pacemaker of the heart is the:
A. AV node
B. Bundle branches
C. Purkinje fibers
D. SA node
3.
Cardiac muscle differs from skeletal muscle because cardiac muscle:
A. Requires motor neuron stimulation
B. Cannot contract without the brain
C. Has spontaneous depolarization
D. Has no refractory period
4.
The unstable resting membrane potential of pacemaker cells is responsible for:
A. Plateau phase
B. Automaticity
C. Tetany
D. Hyperpolarization
, 5.
Automaticity is also known as:
A. Excitability
B. Conductivity
C. Self-excitation
D. Inhibition
6.
The autonomic nervous system primarily:
A. Initiates each heartbeat
B. Changes heart rate
C. Produces action potentials
D. Opens sodium channels
1.
Gap junctions are found within:
A. Sarcoplasmic reticulum
B. T tubules
C. Intercalated discs
D. Z discs
8.
Gap junctions allow:
A. Blood flow
B. Rapid electrical communication
C. Valve closure
D. Calcium storage
9.
The heart behaves electrically as:
A. Independent muscle fibers
B. Functional syncytium
