Exss 380 Final Exam Test Questions
With 100% Correct Answers 2026-2027
Updated.
1. The point of communication between an axon of cell A and the dendrite of cell B is the _.
a. Soma
b. Axon
c. Neurotransmitter
d. Synapse - Answer D. Synapse
2. The ___ is responsible for increased nerve conduction velocity.
a. Axon
b. Myelin sheath
c. Dendrite
D. Neurotransmitter - Answer Myelin sheath
3. What is not a function of a glial cell?
a. Insulate axons
b. Transmit neurotransmitter into the neuromuscular junction
c. Phagocytosis following disease
d. Clear excess neurotransmitter - Answer Transmit neurotransmitter into the neuromuscular
junction
4. The principle of dynamic polarization states that physiological signals within a nerve cell only
flow in one direction.
True/False - Answer True
5. The cerebellum is considered ____ to the frontal lobe.
a. Rostral
b. Caudal
c. Anterior
d. Superior - Answer Caudal
,6. This forebrain structure is the "gatekeeper" of sensory information, responsible for routing
information to higher brain centers
a. Sensory cortex
b. Cerebellum
c. Thalamus
d. Olfactory lobe - Answer Thalamus
7. The majority of neurons found in both the CNS and PNS are ___.
a. Efferent neurons
b. Afferent neurons
c. Association neurons
D. Interneurons - Answer Interneurons
8. A bundle of nerve fibers running superior to inferior in the central nervous system are
referred to as a _____.
a. Ganglion
b. Nucleus
c. Tract
d. nerve - Answer Tract
9. When at rest, the extracellular (outside cell) space is ____ charged relative to the intracellular
(inside cell) space.
a. Negatively
b. Positively
c. Neutrally - Answer Positively
10. Which of these aspects of the action potential is largely responsible for not allowing "back
firing" of the action potential in the opposite direction of the intended propagation.
a. The rising edge of the depolarization portion of the AP.
,b. The threshold of the cell
c. The refractory period
d. The resting membrane potential - Answer The refractory period
11. ____ is the greatest concentration outside the cell while the neural membrane is at rest.
a. Na+
b. K+
c. A- - Answer a. Na+
12. A patient has an inability developing motor programs, which brain region is most likely
affected?
a. Motor Association Area
b. Somatosensory Association Area
c. Primary Motor Cortex
d. Sensory Cortex - Answer Motor Association Area
13. The smallest component of the nervous system that contributes to muscle contraction is the
_____.
a. Motor end plate
b. Motor unit
c. Muscle twitch
d. Sarcomere - Answer Motor unit
14. Which type of muscle fiber is activated last during muscle contraction where the contraction
intensity is smoothly ramping to be more intense?
a. MN with a diameter of 50 microns
b. MN with a diameter of 60 microns
c. MN with a diameter of 80 microns
d. All will be recruited at the same time as long as they have myelin - Answer MN with a
diameter of 80 microns
, 15. The number of muscle fiber innervated by a single motor neuron is identified by the ___.
a. Henneman principle
b. Innervation constant
c. Innervation ratio
d. Motor ratio - Answer Innervation ratio
16. The ____ refers to the specific synapse between the -motorneuron and the sarcolemma, or
muscle tissue.
a. Motor unit
b. Synaptic cleft
c. Myotendinous junction
d. Motor end plate - Answer Motor end plate
17. Which type of neuron conducts nerve impulses toward the central nervous system?
a. Afferent
b. Association
c. Efferent
d. Interneuron - Answer Afferent
18. This is the last area of the cerebrum that information passes through as before motor signals
descend to the spinal cord ____.
a. Premotor association cortex
b. Somatosensory association cortex
c. Primary motor cortex
d. Primary somatosensory cortex - Answer Primary motor cortex
19. the _____ area of the cerebral cortex is responsible for integration and interpretation of
information from peripheral receptors.
a. Supplementary motor
b. Somatosensory
c. Premotor
With 100% Correct Answers 2026-2027
Updated.
1. The point of communication between an axon of cell A and the dendrite of cell B is the _.
a. Soma
b. Axon
c. Neurotransmitter
d. Synapse - Answer D. Synapse
2. The ___ is responsible for increased nerve conduction velocity.
a. Axon
b. Myelin sheath
c. Dendrite
D. Neurotransmitter - Answer Myelin sheath
3. What is not a function of a glial cell?
a. Insulate axons
b. Transmit neurotransmitter into the neuromuscular junction
c. Phagocytosis following disease
d. Clear excess neurotransmitter - Answer Transmit neurotransmitter into the neuromuscular
junction
4. The principle of dynamic polarization states that physiological signals within a nerve cell only
flow in one direction.
True/False - Answer True
5. The cerebellum is considered ____ to the frontal lobe.
a. Rostral
b. Caudal
c. Anterior
d. Superior - Answer Caudal
,6. This forebrain structure is the "gatekeeper" of sensory information, responsible for routing
information to higher brain centers
a. Sensory cortex
b. Cerebellum
c. Thalamus
d. Olfactory lobe - Answer Thalamus
7. The majority of neurons found in both the CNS and PNS are ___.
a. Efferent neurons
b. Afferent neurons
c. Association neurons
D. Interneurons - Answer Interneurons
8. A bundle of nerve fibers running superior to inferior in the central nervous system are
referred to as a _____.
a. Ganglion
b. Nucleus
c. Tract
d. nerve - Answer Tract
9. When at rest, the extracellular (outside cell) space is ____ charged relative to the intracellular
(inside cell) space.
a. Negatively
b. Positively
c. Neutrally - Answer Positively
10. Which of these aspects of the action potential is largely responsible for not allowing "back
firing" of the action potential in the opposite direction of the intended propagation.
a. The rising edge of the depolarization portion of the AP.
,b. The threshold of the cell
c. The refractory period
d. The resting membrane potential - Answer The refractory period
11. ____ is the greatest concentration outside the cell while the neural membrane is at rest.
a. Na+
b. K+
c. A- - Answer a. Na+
12. A patient has an inability developing motor programs, which brain region is most likely
affected?
a. Motor Association Area
b. Somatosensory Association Area
c. Primary Motor Cortex
d. Sensory Cortex - Answer Motor Association Area
13. The smallest component of the nervous system that contributes to muscle contraction is the
_____.
a. Motor end plate
b. Motor unit
c. Muscle twitch
d. Sarcomere - Answer Motor unit
14. Which type of muscle fiber is activated last during muscle contraction where the contraction
intensity is smoothly ramping to be more intense?
a. MN with a diameter of 50 microns
b. MN with a diameter of 60 microns
c. MN with a diameter of 80 microns
d. All will be recruited at the same time as long as they have myelin - Answer MN with a
diameter of 80 microns
, 15. The number of muscle fiber innervated by a single motor neuron is identified by the ___.
a. Henneman principle
b. Innervation constant
c. Innervation ratio
d. Motor ratio - Answer Innervation ratio
16. The ____ refers to the specific synapse between the -motorneuron and the sarcolemma, or
muscle tissue.
a. Motor unit
b. Synaptic cleft
c. Myotendinous junction
d. Motor end plate - Answer Motor end plate
17. Which type of neuron conducts nerve impulses toward the central nervous system?
a. Afferent
b. Association
c. Efferent
d. Interneuron - Answer Afferent
18. This is the last area of the cerebrum that information passes through as before motor signals
descend to the spinal cord ____.
a. Premotor association cortex
b. Somatosensory association cortex
c. Primary motor cortex
d. Primary somatosensory cortex - Answer Primary motor cortex
19. the _____ area of the cerebral cortex is responsible for integration and interpretation of
information from peripheral receptors.
a. Supplementary motor
b. Somatosensory
c. Premotor
