EXSS 380 FINAL REVIEW QUESTIONS & ANSWERS
The _____ is responsible for increased nerve conduction velocity. - Answers :Myelin
Sheath
Depletion of _____ is associated with Alzheimer's disease. - Answers :Serotonin
Input to the soma is achieved via the _____, while output is achieved via the _____. -
Answers :Dendrite; axon
The neurotransmitter associated with skeletal muscle depolarization is _____. -
Answers :Acetylcholine
The ________ area of the cerebral cortex is responsible for integration and
interpretation of information from peripheral receptors. - Answers :Somatosensory
association
Neurotransmitter released by an inhibitory neuron _____. - Answers :Increases post
synaptic permeability to K+
The interval during the action potential when a neuron cannot be depolarized refers to
_____. - Answers :The absolute refractory period
Which of the following would be represented by the largest area of the primary motor
cortex? - Answers :Muscles of the palmar hand
The _____ is responsible for integration of sensory and motor information to produce
smooth movement. - Answers :cerebellum
The mechanism by which a single presynaptic neuron is capable of increasing the
EPSP is _____. - Answers :temporal summation
The majority of neural tracts are transferred to the opposite side of the CNS near the
____. - Answers :Medulla Oblongata
The cerebellum has connections to all of the following except _____. - Answers :Alpha
Motor Neurons (because they are in the spinal cord)
The dorsal roots of spinal nerves contain ____. - Answers :sensory neurons
The ventral roots of spinal nerves contain _____. - Answers :Motor Neurons
More than half of the neurons in the brain are located in the _____. - Answers
:Cerebellum
, Neuron A is Type Ia and has an axonal diameter of 25 microns. Neuron B is Type Ib
and has an axonal diameter of 18 microns. Which neuron has the highest conduction
velocity? - Answers :Neuron A (because it is wider)
A neuroscientist is measuring activity from a sensory neuron from the biceps brachii.
During isometric muscle contraction, this neuron displays high-frequency activity. What
type of neuron is the researcher measuring? - Answers :Type Ib
Excitation of the Ia inhibitory interneuron would _____. - Answers :Increase reciprocal
inhibition
Excitation of the Ib afferent _____ in the Ib inhibitory interneuron. - Answers :Increase
permeability to Na+
A neuroscientist is measuring activity from a sensory neuron innervating the vastus
lateralis. During rapid eccentric action the neuron displays high frequency activity. What
type of neuron is the researcher measuring? - Answers :Type Ia
The _____ neuron is sensitive to muscle length. - Answers :Type Ia
Inhibition of an inhibitory neuron results in _____. - Answers :Disinhibition
When contraction of the agonist causes inhibition of the antagonist, _____ is occurring.
- Answers :reciprocal Inhibition is occurring
Autogenic inhibition is initiated by the _____. - Answers :Type Ib
The strength of reciprocal inhibition is governed by activity of the _____. - Answers :Ia
inhibitory neurons
A form of inhibition that decreases the efficacy of selective synapses is _____. -
Answers :presynaptic inhibition
Muscle activity that produces voluntary movement patterns is derived from ______
command signals from the CNS. - Answers :Feedforward
_____ is designed to avoid noxious (painful) stimuli. - Answers :Flexion-withdrawal
reflex
Decreased levels of _____ have been associated with Parkinson's disease. - Answers
:Dopamine
The majority of neurons are _____. - Answers :Association Neurons
A bundle of nerve fibers in the central nervous system is referred to as a _____. -
Answers :Tract
The _____ is responsible for increased nerve conduction velocity. - Answers :Myelin
Sheath
Depletion of _____ is associated with Alzheimer's disease. - Answers :Serotonin
Input to the soma is achieved via the _____, while output is achieved via the _____. -
Answers :Dendrite; axon
The neurotransmitter associated with skeletal muscle depolarization is _____. -
Answers :Acetylcholine
The ________ area of the cerebral cortex is responsible for integration and
interpretation of information from peripheral receptors. - Answers :Somatosensory
association
Neurotransmitter released by an inhibitory neuron _____. - Answers :Increases post
synaptic permeability to K+
The interval during the action potential when a neuron cannot be depolarized refers to
_____. - Answers :The absolute refractory period
Which of the following would be represented by the largest area of the primary motor
cortex? - Answers :Muscles of the palmar hand
The _____ is responsible for integration of sensory and motor information to produce
smooth movement. - Answers :cerebellum
The mechanism by which a single presynaptic neuron is capable of increasing the
EPSP is _____. - Answers :temporal summation
The majority of neural tracts are transferred to the opposite side of the CNS near the
____. - Answers :Medulla Oblongata
The cerebellum has connections to all of the following except _____. - Answers :Alpha
Motor Neurons (because they are in the spinal cord)
The dorsal roots of spinal nerves contain ____. - Answers :sensory neurons
The ventral roots of spinal nerves contain _____. - Answers :Motor Neurons
More than half of the neurons in the brain are located in the _____. - Answers
:Cerebellum
, Neuron A is Type Ia and has an axonal diameter of 25 microns. Neuron B is Type Ib
and has an axonal diameter of 18 microns. Which neuron has the highest conduction
velocity? - Answers :Neuron A (because it is wider)
A neuroscientist is measuring activity from a sensory neuron from the biceps brachii.
During isometric muscle contraction, this neuron displays high-frequency activity. What
type of neuron is the researcher measuring? - Answers :Type Ib
Excitation of the Ia inhibitory interneuron would _____. - Answers :Increase reciprocal
inhibition
Excitation of the Ib afferent _____ in the Ib inhibitory interneuron. - Answers :Increase
permeability to Na+
A neuroscientist is measuring activity from a sensory neuron innervating the vastus
lateralis. During rapid eccentric action the neuron displays high frequency activity. What
type of neuron is the researcher measuring? - Answers :Type Ia
The _____ neuron is sensitive to muscle length. - Answers :Type Ia
Inhibition of an inhibitory neuron results in _____. - Answers :Disinhibition
When contraction of the agonist causes inhibition of the antagonist, _____ is occurring.
- Answers :reciprocal Inhibition is occurring
Autogenic inhibition is initiated by the _____. - Answers :Type Ib
The strength of reciprocal inhibition is governed by activity of the _____. - Answers :Ia
inhibitory neurons
A form of inhibition that decreases the efficacy of selective synapses is _____. -
Answers :presynaptic inhibition
Muscle activity that produces voluntary movement patterns is derived from ______
command signals from the CNS. - Answers :Feedforward
_____ is designed to avoid noxious (painful) stimuli. - Answers :Flexion-withdrawal
reflex
Decreased levels of _____ have been associated with Parkinson's disease. - Answers
:Dopamine
The majority of neurons are _____. - Answers :Association Neurons
A bundle of nerve fibers in the central nervous system is referred to as a _____. -
Answers :Tract
