NURSING • TESTBANK • PRACTICE QUESTIONS
TESTBANK
Medical Physiology
PRACTICE QUESTIONS
Answers shown after each question
© MOh T
Original Educational Practice Questions
For Nursing Students
© MOh T | @moht | Educational Use Only
,Testbank | Medical Physiology | © MOh T @moht
1. Homeostasis is best defined as:
A. Complete absence of change in the body
B. Maintenance of a relatively stable internal environment
C. Only external environmental stability
D. Rapid uncontrolled fluctuations
Answer: A
2. Negative feedback loops:
A. Amplify the original stimulus
B. Reverse or counteract the original stimulus
C. Have no effect on the stimulus
D. Only occur in disease
Answer: B
3. Positive feedback loops:
A. Always maintain stability by opposing change
B. Amplify the original stimulus until a climax event
C. Never occur in healthy physiology
D. Only reduce hormone levels
Answer: C
4. The resting membrane potential of a typical neuron is approximately:
A. +30 mV
B. –70 mV
C. 0 mV
D. +70 mV
Answer: D
5. Depolarization of a neuron membrane is mainly due to:
A. Potassium influx
B. Sodium influx
C. Chloride influx only
D. Calcium efflux only
Answer: A
6. Repolarization is mainly due to:
A. Sodium influx
B. Potassium efflux
C. Sodium efflux only without potassium
D. Calcium influx
Answer: B
7. The sodium-potassium pump moves:
A. 2 Na+ in and 3 K+ out
B. 3 Na+ out and 2 K+ in
C. Equal Na+ and K+ in the same direction
D. Only sodium without potassium
Answer: C
8. An action potential is:
A. A graded local potential only
B. An all-or-none rapid depolarization and repolarization
C. Always subthreshold
D. Only a passive spread without channels
Answer: D
9. Saltatory conduction occurs in:
A. Unmyelinated axons only
B. Myelinated axons at nodes of Ranvier
C. Only dendrites
D. Only cell bodies
Answer: A
10. A synapse is the site where:
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, Testbank | Medical Physiology | © MOh T @moht
A. Two bones articulate
B. A neuron communicates with another cell via neurotransmitter
C. Only blood is filtered
D. Only muscle attaches to bone
Answer: B
11. Acetylcholine at the neuromuscular junction causes:
A. Muscle relaxation only
B. Depolarization of the muscle end-plate and contraction
C. Only inhibition of release of calcium
D. No effect on skeletal muscle
Answer: C
12. Skeletal muscle contraction requires:
A. Only sodium without calcium
B. Calcium binding to troponin to expose binding sites
C. Only ATP without calcium
D. Inhibition of actin-myosin interaction
Answer: D
13. The sliding filament theory states that:
A. Actin and myosin filaments shorten in length
B. Actin and myosin filaments slide past each other
C. Only myosin disappears during contraction
D. Sarcomeres lengthen during contraction
Answer: A
14. Isometric contraction means:
A. Muscle shortens with constant tension
B. Tension develops without change in muscle length
C. Only lengthening under load
D. No tension development
Answer: B
15. Isotonic contraction means:
A. Tension changes without length change
B. Muscle length changes while tension remains relatively constant
C. Only isometric hold
D. No movement ever
Answer: C
16. Cardiac muscle is characterized by:
A. Voluntary control and multinucleated peripheral nuclei
B. Involuntary control, striations, and intercalated discs
C. Only smooth non-striated fibers
D. No gap junctions
Answer: D
17. The pacemaker of the heart is normally the:
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
Answer: A
18. The PR interval on ECG represents:
A. Ventricular depolarization only
B. Time from atrial depolarization to start of ventricular depolarization
C. Only ventricular repolarization
D. Only atrial repolarization
Answer: B
19. The QRS complex represents:
A. Atrial depolarization
© MOh T | @moht | Educational Use Only Page 2
TESTBANK
Medical Physiology
PRACTICE QUESTIONS
Answers shown after each question
© MOh T
Original Educational Practice Questions
For Nursing Students
© MOh T | @moht | Educational Use Only
,Testbank | Medical Physiology | © MOh T @moht
1. Homeostasis is best defined as:
A. Complete absence of change in the body
B. Maintenance of a relatively stable internal environment
C. Only external environmental stability
D. Rapid uncontrolled fluctuations
Answer: A
2. Negative feedback loops:
A. Amplify the original stimulus
B. Reverse or counteract the original stimulus
C. Have no effect on the stimulus
D. Only occur in disease
Answer: B
3. Positive feedback loops:
A. Always maintain stability by opposing change
B. Amplify the original stimulus until a climax event
C. Never occur in healthy physiology
D. Only reduce hormone levels
Answer: C
4. The resting membrane potential of a typical neuron is approximately:
A. +30 mV
B. –70 mV
C. 0 mV
D. +70 mV
Answer: D
5. Depolarization of a neuron membrane is mainly due to:
A. Potassium influx
B. Sodium influx
C. Chloride influx only
D. Calcium efflux only
Answer: A
6. Repolarization is mainly due to:
A. Sodium influx
B. Potassium efflux
C. Sodium efflux only without potassium
D. Calcium influx
Answer: B
7. The sodium-potassium pump moves:
A. 2 Na+ in and 3 K+ out
B. 3 Na+ out and 2 K+ in
C. Equal Na+ and K+ in the same direction
D. Only sodium without potassium
Answer: C
8. An action potential is:
A. A graded local potential only
B. An all-or-none rapid depolarization and repolarization
C. Always subthreshold
D. Only a passive spread without channels
Answer: D
9. Saltatory conduction occurs in:
A. Unmyelinated axons only
B. Myelinated axons at nodes of Ranvier
C. Only dendrites
D. Only cell bodies
Answer: A
10. A synapse is the site where:
© MOh T | @moht | Educational Use Only Page 1
, Testbank | Medical Physiology | © MOh T @moht
A. Two bones articulate
B. A neuron communicates with another cell via neurotransmitter
C. Only blood is filtered
D. Only muscle attaches to bone
Answer: B
11. Acetylcholine at the neuromuscular junction causes:
A. Muscle relaxation only
B. Depolarization of the muscle end-plate and contraction
C. Only inhibition of release of calcium
D. No effect on skeletal muscle
Answer: C
12. Skeletal muscle contraction requires:
A. Only sodium without calcium
B. Calcium binding to troponin to expose binding sites
C. Only ATP without calcium
D. Inhibition of actin-myosin interaction
Answer: D
13. The sliding filament theory states that:
A. Actin and myosin filaments shorten in length
B. Actin and myosin filaments slide past each other
C. Only myosin disappears during contraction
D. Sarcomeres lengthen during contraction
Answer: A
14. Isometric contraction means:
A. Muscle shortens with constant tension
B. Tension develops without change in muscle length
C. Only lengthening under load
D. No tension development
Answer: B
15. Isotonic contraction means:
A. Tension changes without length change
B. Muscle length changes while tension remains relatively constant
C. Only isometric hold
D. No movement ever
Answer: C
16. Cardiac muscle is characterized by:
A. Voluntary control and multinucleated peripheral nuclei
B. Involuntary control, striations, and intercalated discs
C. Only smooth non-striated fibers
D. No gap junctions
Answer: D
17. The pacemaker of the heart is normally the:
A. AV node
B. SA node
C. Bundle of His
D. Purkinje fibers
Answer: A
18. The PR interval on ECG represents:
A. Ventricular depolarization only
B. Time from atrial depolarization to start of ventricular depolarization
C. Only ventricular repolarization
D. Only atrial repolarization
Answer: B
19. The QRS complex represents:
A. Atrial depolarization
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