Exam (elaborations)
BIO 181 (Capco ASU) Exam 3 (Final Exam)
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- BIO 181 Exam 3
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- BIO 181 Exam 3
BIO 181 (Capco ASU) Exam 3 (Final Exam)
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BIO 181 (Capco ASU) Exam 3 (FinalExam)
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
The axon hillock in the pre-synaptic neuron fires based on temporal and
spatial summation of inputs. - -True
-T/F
Voltage-gated ion channels open when a protein binds to the receptor. - -
False
-The neural tissues are: - -Spinal cord, sensory neurons, and brain
-T/ F Receptors are made from membrane-bound polyribosomes. - -True
-Draw a neuron, and label all the parts as described in lecture. - -
-Briefly explain why the action potential flows only from the axon hillock to
the terminal web. - -The action potential originates from the axon hillock
which initiates the flow of the action potential because of the presence of
higher density voltage-gated ion channels.
-T/F Acetylcholine exocytosed from the presynaptic cell travels to the
postsynaptic cell to start the action potential in the postsynaptic cell. - -True
-How do the glial cells (i.e., myelin sheath) speed up the firing of neurons? -
-The cell wraps extensions of a fatty insulating substance (myelin) around
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