BI232 Final EXAM QUESTIONS WITH CORRECT ANSWERS

BI232 Final EXAM QUESTIONS WITH
CORRECT ANSWERS

Where are ligand-gated ion channels located? - CORRECT ANSWER✔✔-
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dendrite


Where are voltage-gated Na+ channels located? - CORRECT
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ANSWER✔✔-axon


Where are vesicle-filled neurotransmitters located? - CORRECT
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ANSWER✔✔-axon terminal |




Where is the nucleus located? - CORRECT ANSWER✔✔-soma
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digest unwanted materials: - CORRECT ANSWER✔✔-microglia
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make myelin in the CNS: - CORRECT ANSWER✔✔-Oligodendrocytes
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make myelin in the PNS: - CORRECT ANSWER✔✔-Schwann cells
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make and circulate CSF: - CORRECT ANSWER✔✔-Ependymal cells
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,found in ganglia in the PNS: - CORRECT ANSWER✔✔-Satellite cells
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regulate the BBB: - CORRECT ANSWER✔✔-Astrocytes
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More myelin is found in: - CORRECT ANSWER✔✔-white matter
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Which of the following would likely be myelinated? - CORRECT
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ANSWER✔✔-Axons that carry important information | | | |




Long axons |




Fill out the following table regarding the activity of the Na+/K+ pump: -
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CORRECT ANSWER✔✔-Na+, 3, outward | | |




K+, 2, inward
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The nicotinic Acetylcholine receptor is a [a]-gated receptor. It opens up
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when [b] binds to it and allows [c] ions into the cell, which causes a [d]
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potential in the post-synaptic cell. - CORRECT ANSWER✔✔-[a[ ligand
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[b] acetylcholine
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[c] cations (Na+)
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[d] graded
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,single cells : [a]
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contains blood vessels and connective tissue: [b]
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sends information only in 1 direction: [c]
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Can send information in 2 directions: [d]
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Considered an organ: [e] - CORRECT ANSWER✔✔-[a] neuron
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[b] nerve
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[c] neuron
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[d] nerve
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[e] nerve
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Match the following with reference to the image of an Action Potential
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above:
A graded potential: [a]
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Depolarization: [b] |




Voltage-gated Na+ channels are switching from open to inactive: [c]
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Repolarization: [d] |




Hyperpolarization: [e] |




Voltage-gated Na+ channels are open: [f] | | | | |




A ligand-gated Na+ channel is opening: [g]
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Relative refractory period: [h]
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Arrow is closest to the threshold potential: [i]
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, Voltage-gated Na+ channels are switching from inactive to closed: [j] -
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CORRECT ANSWER✔✔-[a] A
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[b] B |




[c] C |




[d] D |




[e] E |




[f] B
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[g] A |




[h] E |




[i] A
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[j] E
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What happens at synapses? - CORRECT ANSWER✔✔-Cell-to-cell
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communication


Excitatory Post Synaptic Potentials (EPSPs): [a] the target cell, and are
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examples of [b].
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Inhibitory Post Synaptic Potentials (IPSPs): [c] the target cell, and are
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examples of [d]. - CORRECT ANSWER✔✔-[a] depolarize
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[b] graded potentials
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[c] hyperpolarize
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[d] graded potentials
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