APHY 164 EXAM AND PRACTICE EXAM NEWEST 2025
TEST BANK| COMPLETE 450 REAL EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS/ ALREADY
GRADED A+| APHY 164 FINAL EXAM REVIEW 2025
(BRAND NEW!!)
1. What are the three essential roles of the nervous system?
A) Thinking, remembering, and sleeping
B) Sensing, integrating, and responding
C) Movement, digestion, and secretion
D) Circulation, filtration, and excretion
Correct Answer: B
Rationale: The nervous system functions by sensing stimuli (sensory
input), integrating sensory information (processing), and
responding through motor output to effectors (muscles or glands)
to maintain homeostasis .
1
,2. Which division of the nervous system carries impulses toward
the central nervous system?
A) Motor (efferent) division
B) Sensory (afferent) division
C) Autonomic division
D) Somatic division
Correct Answer: B
Rationale: Sensory (afferent) neurons carry impulses from sensory
receptors toward the CNS. Motor (efferent) neurons carry impulses
away from the CNS to effectors .
3. Which type of neuron is found only in the central nervous
system and connects sensory and motor neurons?
A) Afferent neurons
B) Efferent neurons
C) Interneurons
D) Unipolar neurons
2
,Correct Answer: C
Rationale: Interneurons are located entirely within the CNS and
serve as connectors between sensory (afferent) and motor
(efferent) pathways, enabling integration and reflex arcs .
4. What is the correct order of impulse conduction stages in a
neuron?
A) Depolarization → Resting potential → Repolarization →
Action potential → Refractory period
B) Resting potential → Depolarization → Action potential →
Repolarization → Refractory period
C) Action potential → Depolarization → Resting potential →
Repolarization → Refractory period
D) Resting potential → Repolarization → Depolarization →
Action potential → Refractory period
Correct Answer: B
Rationale: The sequence begins with resting potential (polarized),
3
, followed by depolarization (Na+ entry), action potential (rapid
depolarization), repolarization (K+ exit), and refractory period
(reset by Na+/K+ pump) .
5. During which stage of impulse conduction does sodium (Na⁺)
enter the cell?
A) Resting potential
B) Depolarization
C) Repolarization
D) Refractory period
Correct Answer: B
Rationale: Depolarization is triggered by a stimulus that opens
voltage-gated sodium channels, allowing Na⁺ to flow into the cell,
making the interior less negative .
6. What occurs during repolarization of a neuron?
A) Sodium enters the cell
B) Potassium exits the cell
4
TEST BANK| COMPLETE 450 REAL EXAM QUESTIONS
AND CORRECT VERIFIED ANSWERS/ ALREADY
GRADED A+| APHY 164 FINAL EXAM REVIEW 2025
(BRAND NEW!!)
1. What are the three essential roles of the nervous system?
A) Thinking, remembering, and sleeping
B) Sensing, integrating, and responding
C) Movement, digestion, and secretion
D) Circulation, filtration, and excretion
Correct Answer: B
Rationale: The nervous system functions by sensing stimuli (sensory
input), integrating sensory information (processing), and
responding through motor output to effectors (muscles or glands)
to maintain homeostasis .
1
,2. Which division of the nervous system carries impulses toward
the central nervous system?
A) Motor (efferent) division
B) Sensory (afferent) division
C) Autonomic division
D) Somatic division
Correct Answer: B
Rationale: Sensory (afferent) neurons carry impulses from sensory
receptors toward the CNS. Motor (efferent) neurons carry impulses
away from the CNS to effectors .
3. Which type of neuron is found only in the central nervous
system and connects sensory and motor neurons?
A) Afferent neurons
B) Efferent neurons
C) Interneurons
D) Unipolar neurons
2
,Correct Answer: C
Rationale: Interneurons are located entirely within the CNS and
serve as connectors between sensory (afferent) and motor
(efferent) pathways, enabling integration and reflex arcs .
4. What is the correct order of impulse conduction stages in a
neuron?
A) Depolarization → Resting potential → Repolarization →
Action potential → Refractory period
B) Resting potential → Depolarization → Action potential →
Repolarization → Refractory period
C) Action potential → Depolarization → Resting potential →
Repolarization → Refractory period
D) Resting potential → Repolarization → Depolarization →
Action potential → Refractory period
Correct Answer: B
Rationale: The sequence begins with resting potential (polarized),
3
, followed by depolarization (Na+ entry), action potential (rapid
depolarization), repolarization (K+ exit), and refractory period
(reset by Na+/K+ pump) .
5. During which stage of impulse conduction does sodium (Na⁺)
enter the cell?
A) Resting potential
B) Depolarization
C) Repolarization
D) Refractory period
Correct Answer: B
Rationale: Depolarization is triggered by a stimulus that opens
voltage-gated sodium channels, allowing Na⁺ to flow into the cell,
making the interior less negative .
6. What occurs during repolarization of a neuron?
A) Sodium enters the cell
B) Potassium exits the cell
4
