PSIO 305 EXAM 2 QUESTIONS AND ANSWERS
Using the figure seen here indicating the % myosin heavy chain types found in soleus
muscle fibers, what type of action would you say the soleus muscle is responsible for
primarily? (This is another nomenclature for categorizing muscle fiber types and Type I
is comparable to SO fibers, type II A is comparable to FOG fibers, and IIX comparable
to FG muscle fibers).
Question 9 options:
Standing
Throwing events such as the discus or shot put
Sprinting
Power lifting - Answers :Standing
A motor unit is the smallest voluntary functional unit of force production and consists of
one motor neuron and all the muscle fibers that it innervates.
Question 10 options:
True
False - Answers :true
The effect of Neuron A on Neuron B is determined by all of the following EXCEPT?
Question 1 options:
Type of Neurotransmitter released by Neuron A
Length of Neuron A's axon
Number of inputs coming in rapid sequence from Neuron A
Type of post-synaptic receptors on Neuron B - Answers :Length of Neuron A's axon
Which of the following have provided true insight into our present day understanding of
the functions of the central nervous system? (Check all that apply)
Question 5 options:
The surface characteristics of a person's skull
Optogenetics
Genetic manipulations (knock-out/in experimental models)
Single cell (and multi-cell) electrical recordings
fMRI or PET Scans indicating alterations in blood supply to synaptically active brain
regions
Immunohistochemistry and Histological organization - Answers :Genetic manipulations
(knock-out/in experimental models)
Single cell (and multi-cell) electrical recordings
fMRI or PET Scans indicating alterations in blood supply to synaptically active brain
regions
Immunohistochemistry and Histological organization
The speed at which cross bridges form is largely dependent on Myosin ATPase activity
which is largely homogeneous (i.e., the same) across muscle fiber types.
Question 7 options
, True
False - Answers :False
Type FG (or IIb or II x) muscle fibers typically display fast contraction speed,
comparatively large to very large forces, and are non-fatigable.
Question 8 options:
True
False - Answers :False
Imagine you are walking and encounter an unexpected change in ground elevation and
you begin to stumble. In order to recover your balance, what components of the nervous
systems would be most significantly involved?
Question 1 options:
Primary motor cortex and corticospinal tracts
Cerebellum and vestibulospinal tracts
Sensory cortex and somatosensory tracts
Cerebrum and corticospinal tracts - Answers :Cerebellum and vestibulospinal tracts
The primary motor cortex is part of which lobe of the brain?
Question 2 options:
Occipital
Parietal
Temporal
Frontal - Answers :Frontal
Single neurons typically receive thousands of synaptic inputs which are resolved by
_____________ summation
Question 2 options:
Temporal process
Spatial & temporal
Temporal
Nodes of Ranvier
Spatial - Answers :Spatial & temporal
Acetylecholine is typically associated with the opening of ___________________ in the
synapses of the motor cortex resulting in __________________________.
Question 3 options:
Ligand-gated sodium channels; depolarization
Calcium channels; hyperpolarization
Calcium channels; depolarization
Ligand-gated sodium channels; hyperpolarization - Answers :Ligand-gated sodium
channels; depolarization
Temporal summation of excitatory inputs onto a neuron (we will refer to that neuron as
Neuron A) refers to the... (Check all the following that can correctly complete this
sentence)
Using the figure seen here indicating the % myosin heavy chain types found in soleus
muscle fibers, what type of action would you say the soleus muscle is responsible for
primarily? (This is another nomenclature for categorizing muscle fiber types and Type I
is comparable to SO fibers, type II A is comparable to FOG fibers, and IIX comparable
to FG muscle fibers).
Question 9 options:
Standing
Throwing events such as the discus or shot put
Sprinting
Power lifting - Answers :Standing
A motor unit is the smallest voluntary functional unit of force production and consists of
one motor neuron and all the muscle fibers that it innervates.
Question 10 options:
True
False - Answers :true
The effect of Neuron A on Neuron B is determined by all of the following EXCEPT?
Question 1 options:
Type of Neurotransmitter released by Neuron A
Length of Neuron A's axon
Number of inputs coming in rapid sequence from Neuron A
Type of post-synaptic receptors on Neuron B - Answers :Length of Neuron A's axon
Which of the following have provided true insight into our present day understanding of
the functions of the central nervous system? (Check all that apply)
Question 5 options:
The surface characteristics of a person's skull
Optogenetics
Genetic manipulations (knock-out/in experimental models)
Single cell (and multi-cell) electrical recordings
fMRI or PET Scans indicating alterations in blood supply to synaptically active brain
regions
Immunohistochemistry and Histological organization - Answers :Genetic manipulations
(knock-out/in experimental models)
Single cell (and multi-cell) electrical recordings
fMRI or PET Scans indicating alterations in blood supply to synaptically active brain
regions
Immunohistochemistry and Histological organization
The speed at which cross bridges form is largely dependent on Myosin ATPase activity
which is largely homogeneous (i.e., the same) across muscle fiber types.
Question 7 options
, True
False - Answers :False
Type FG (or IIb or II x) muscle fibers typically display fast contraction speed,
comparatively large to very large forces, and are non-fatigable.
Question 8 options:
True
False - Answers :False
Imagine you are walking and encounter an unexpected change in ground elevation and
you begin to stumble. In order to recover your balance, what components of the nervous
systems would be most significantly involved?
Question 1 options:
Primary motor cortex and corticospinal tracts
Cerebellum and vestibulospinal tracts
Sensory cortex and somatosensory tracts
Cerebrum and corticospinal tracts - Answers :Cerebellum and vestibulospinal tracts
The primary motor cortex is part of which lobe of the brain?
Question 2 options:
Occipital
Parietal
Temporal
Frontal - Answers :Frontal
Single neurons typically receive thousands of synaptic inputs which are resolved by
_____________ summation
Question 2 options:
Temporal process
Spatial & temporal
Temporal
Nodes of Ranvier
Spatial - Answers :Spatial & temporal
Acetylecholine is typically associated with the opening of ___________________ in the
synapses of the motor cortex resulting in __________________________.
Question 3 options:
Ligand-gated sodium channels; depolarization
Calcium channels; hyperpolarization
Calcium channels; depolarization
Ligand-gated sodium channels; hyperpolarization - Answers :Ligand-gated sodium
channels; depolarization
Temporal summation of excitatory inputs onto a neuron (we will refer to that neuron as
Neuron A) refers to the... (Check all the following that can correctly complete this
sentence)
