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Bio quiz 9
Terms in this set (10)
In looking at a section through the brain, you see a neuron with a number of shrublike projections extending from one side of the cell body and a single long projection extending from the other side. The shrublike projections are most likely _______, and the single long projection is most likely _______.
dendrites; the axon
A disease in which antibodies destroy myelin produced by oligodendrocytes would most likely cause which of the following?
neurons in the brain and spinal cord would conduct action potentials more slowly
Astrocytes influence the connectivity between a pre- and postsynaptic neuron by
taking up and releasing neurotransmitters and therefore altering the activity of neurons
Which of the following statements about microglia is true?
they mediate inflammatory responses in the brain and spinal cord
Consider the following statement: "Voltage is to the flow of electrically charged particles as pressure is to the flow of water." This statement indicates that voltage is the
force that moves charged particles
In a neuron at rest, the resting membrane potential is mainly due to
passive leak currents in the cell membrane
When an action potential arrives at an axon terminal, it causes the opening of ____ channels, which triggers fusion of neurotransmitter vesicles with the cell membrane
Which of the following represents the correct order of the parts of neurons that are involved in the flow of information, beginning with the presynaptic cell and ending where a synapse is made with a post synaptic cell?
dendrites, cell body, axon hillock, axon, axon terminals
Anesthetics and alcohol can permit the blood-brain barrier because they are
If Na+ channels open and sodium ions diffuse into the cel,
the inside of the cell will become less negative
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