BI 232 Midterm 1 Oregon State Exam Questions With Correct Answers

BI 232 Midterm 1 Oregon State Exam
Questions With Correct Answers


Multipolar Neurons - CORRECT ANSWER✔✔-motor neuron &
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interneurons, most common | |




bipolar neurons - CORRECT ANSWER✔✔-rare, special senses: ear nose
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eyes


Unipolar neurons - CORRECT ANSWER✔✔-sensory (PNS)
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Where is the trigger zone on each neuron type - CORRECT ANSWER✔✔-
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multi: near dendrites & cell body
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uni: near dendrites
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Bi: right passed cell body, not very close to dendrites
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subthreshold stimulus - CORRECT ANSWER✔✔-a depolarizing stimulus
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that causes a graded potential but not a actin potential
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Suprathreshold - CORRECT ANSWER✔✔-a depolarizing stimulus that
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causes a neuron to reach threshold & creates an action potential
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, Continuous conduction - CORRECT ANSWER✔✔-slower, unmyelinated
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axon, AP must be transferred through each point of neuron
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Saltatory conduction - CORRECT ANSWER✔✔-conduction down a
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mylenated axon fast because the AP jumps from node to node
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3 things that influence conduction speed - CORRECT ANSWER✔✔-
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diameter of axon: bigger is better | | | | |




Temp: hotter is better | | |




myelination: more myelination is better | | | |




Blood supply of the brain - CORRECT ANSWER✔✔-Right and left carotid
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arteries supply cerebral hemispheres
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rgiht and left vertebral arteries supply the cerebellum and brainstem
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circle of willis connects them all
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Depolarization vs Hyperpolarization ions - CORRECT ANSWER✔✔-d: Na, | | | | | | | |



Ca, Mg, flows in
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H: K out, Cl in
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Gyrus vs sulcus - CORRECT ANSWER✔✔-g: ridge of wrinkle
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