BIO 181 (Capco ASU) Exam 3 (Final Exam) Questions and Answers
T/F Excitatory synapses cause hyperpolarization of post-synaptic cells. False
The resting potential of neurons is: -60 mv (The answer is not on this list.)
T/F The autonomic nervous system contains the sympathetic and the parasympathetic nervous
system. True
In the motor end plate, the event that is the immediate trigger for exocytosis is: Calcium
Ions
Draw an action potential in the axon of a neuron and indicate which ions flow into the neuron
and out of the neuron as the action potential passes at the point where the electrodes are in
the cell. Be sure to assign on the Y-axis the mV of each of these areas. This should be as
described in my lectures.
The action potential is: A result of the movement of ions.
T/F The cell body refers to the part of the neurons that begin at the dendrites and extend to the
axon terminal. False
T/F When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end
plate. True
The post-synaptic cell can be: In glands, muscle cells, neurons
T/F Excitatory synapses cause depolarization of the post-synaptic cell. True
T/F Only pre-synaptic neurons are coated with myelin. False
, T/F Fast neurons as described in lecture are fast because they are surrounded by a type of glial
cell that results in a myelin coating. False
T/F The axon from a pre-synaptic cell contacts the axon of another neuron. False
List the 4 types of glial cells and list a phrase to describe their function. - Microglia: Are
part of the cellular immune system to protect the brain since the humoral immune system
usually cannot cross the BB barrier.
- Astrocytes: Contribute to the blood brain barrier
- Schwann Cells: myelinates axons of the neurons in the PNS
- Oligodendrocytes: Myelinates axons of the neurons of the CNS
The central nervous system (CNS) contains: Brain and Spinal Cord (There is no correct
answer).
T/F Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion
channel. False
T/F Acetylcholine esterase breaks acetylcholine into muscarinic acid False
T/F The membrane potential (resting potential) is largely set by the Na-K- ATPase pump.
True
T/F The receptors in post-synaptic cells are the basis on which the synapse can be defined as
inhibitory or excitatory. False
T/F
T/F Excitatory synapses cause hyperpolarization of post-synaptic cells. False
The resting potential of neurons is: -60 mv (The answer is not on this list.)
T/F The autonomic nervous system contains the sympathetic and the parasympathetic nervous
system. True
In the motor end plate, the event that is the immediate trigger for exocytosis is: Calcium
Ions
Draw an action potential in the axon of a neuron and indicate which ions flow into the neuron
and out of the neuron as the action potential passes at the point where the electrodes are in
the cell. Be sure to assign on the Y-axis the mV of each of these areas. This should be as
described in my lectures.
The action potential is: A result of the movement of ions.
T/F The cell body refers to the part of the neurons that begin at the dendrites and extend to the
axon terminal. False
T/F When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end
plate. True
The post-synaptic cell can be: In glands, muscle cells, neurons
T/F Excitatory synapses cause depolarization of the post-synaptic cell. True
T/F Only pre-synaptic neurons are coated with myelin. False
, T/F Fast neurons as described in lecture are fast because they are surrounded by a type of glial
cell that results in a myelin coating. False
T/F The axon from a pre-synaptic cell contacts the axon of another neuron. False
List the 4 types of glial cells and list a phrase to describe their function. - Microglia: Are
part of the cellular immune system to protect the brain since the humoral immune system
usually cannot cross the BB barrier.
- Astrocytes: Contribute to the blood brain barrier
- Schwann Cells: myelinates axons of the neurons in the PNS
- Oligodendrocytes: Myelinates axons of the neurons of the CNS
The central nervous system (CNS) contains: Brain and Spinal Cord (There is no correct
answer).
T/F Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion
channel. False
T/F Acetylcholine esterase breaks acetylcholine into muscarinic acid False
T/F The membrane potential (resting potential) is largely set by the Na-K- ATPase pump.
True
T/F The receptors in post-synaptic cells are the basis on which the synapse can be defined as
inhibitory or excitatory. False
T/F
