BSC 2086 EXAM REVISION QUESTIOS WITH
100% CORRECT ANSWERS!!
The ________ division of the peripheral nervous system brings sensory information to the
central nervous system.
afferent
The ________ division of the nervous system carries motor commands to muscles and
glands.
efferent
Axons terminate in a series of fine extensions known as
telodendria
The site of intercellular communication between a neuron and another cell is the
synapse
How does blocking retrograde axoplasmic transport in an axon affect the activity of a
neuron?
The soma becomes unable to respond to changes in the distal end of the axon.
Most neurons lack ________ and so are permanently blocked from undergoing cell
division.
centrioles
In order to communicate with multiple cells at the same time, an axon may branch along its
length, producing side branches called __________
collaterals
Deteriorating changes in the distal segment of an axon as a result of a break between it and
the soma is called ________ degeneration.
Wallerian
, ________ account for roughly half of the volume of the nervous system.
Neuroglia
The myelin sheath that covers many CNS axons is formed by
oligodendrocytes
Damage to ependymal cells would most likely affect the
formation of cerebrospinal fluid
In the peripheral nervous system, Schwann cells participate in the repair of damaged
nerves by
forming a cellular cord that directs axonal regrowth
The tiny gaps between adjacent Schwann cells are called
nodes of Ranvier
When a person has a stroke, blood leaks into the brain tissue. Which type of neuroglia cells
would make structural repairs to the damage?
astrocytes
Opening of sodium channels in the axon membrane causes
depolarization
A shift of the resting transmembrane potential toward 0 mV is called
depolarization
Which type of ion channel is always open?
leak
Puffer fish poison blocks voltage-gated sodium channels like a cork. What effect would this
neurotoxin have on the function of neurons?
The axon would be unable to generate action potentials
100% CORRECT ANSWERS!!
The ________ division of the peripheral nervous system brings sensory information to the
central nervous system.
afferent
The ________ division of the nervous system carries motor commands to muscles and
glands.
efferent
Axons terminate in a series of fine extensions known as
telodendria
The site of intercellular communication between a neuron and another cell is the
synapse
How does blocking retrograde axoplasmic transport in an axon affect the activity of a
neuron?
The soma becomes unable to respond to changes in the distal end of the axon.
Most neurons lack ________ and so are permanently blocked from undergoing cell
division.
centrioles
In order to communicate with multiple cells at the same time, an axon may branch along its
length, producing side branches called __________
collaterals
Deteriorating changes in the distal segment of an axon as a result of a break between it and
the soma is called ________ degeneration.
Wallerian
, ________ account for roughly half of the volume of the nervous system.
Neuroglia
The myelin sheath that covers many CNS axons is formed by
oligodendrocytes
Damage to ependymal cells would most likely affect the
formation of cerebrospinal fluid
In the peripheral nervous system, Schwann cells participate in the repair of damaged
nerves by
forming a cellular cord that directs axonal regrowth
The tiny gaps between adjacent Schwann cells are called
nodes of Ranvier
When a person has a stroke, blood leaks into the brain tissue. Which type of neuroglia cells
would make structural repairs to the damage?
astrocytes
Opening of sodium channels in the axon membrane causes
depolarization
A shift of the resting transmembrane potential toward 0 mV is called
depolarization
Which type of ion channel is always open?
leak
Puffer fish poison blocks voltage-gated sodium channels like a cork. What effect would this
neurotoxin have on the function of neurons?
The axon would be unable to generate action potentials
